Open Source Christian Projects | Collaborate & Innovate

Gospel Onchain

An open-source project that stored the entire KJV Bible directly on the Optimism blockchain — censorship-proof, immutable, and free to read. Built by a BuidlGuidl Ethereum developer, with a council voting system in development for community-verified Scripture preservation.

Free Use Bible API

A free, open-source JSON API by AO Lab serving 1,250+ Bible translations with no API keys, no usage limits, and no copyright restrictions — now with an official JavaScript/TypeScript SDK, commentary datasets, and a growing ecosystem of community integrations including MCP servers, a Minecraft plugin, and a Roblox wrapper. 481 commits, 143 stars on GitHub, with active development as of May 2026.

Keep in Touch (kit)

An open-source platform for Christian creators to share project updates, capture email leads, and build in public — with shared faith.tools authentication, built-in blogging, RSS feeds, and AI content moderation.

Bible Vector Search

A free, open-source semantic Bible search tool that uses AI embeddings and vector database technology to find Scripture passages by meaning — not just keywords. Built on the BBE translation, with a public REST API for developers. Part of the Antioch Tech project family by the creator of Obsidian Bible Reference (331+ stars, 54k+ downloads).

fetch(bible)

A free, open-source Bible translations platform by Gracious Tech providing unrestricted access to 1,197+ translations across 962 languages via CDN, client library (v2.0.0), embeddable app, and web enhancer — no API keys, no limits, no registration. 46 stars, 11 forks on GitHub; last commit March 2026.

AndBible

A free, open-source Android Bible study app with 1,500+ documents in 700+ languages, Strong's concordance, split-screen commentary, AI-powered study tools (in v5.1 beta), reading progress tracking, and community-driven development under Sykerö Software — no ads, no cost, no compromise. An iOS version is in development.

Forge

A local-first macOS Bible study app that lets you build atomic notes connected directly to verses — plain markdown files you own forever. Built-in BSB and KJV reader, no account required, free forever. Still pre-1.0 (v0.2.4, Jan 2026).

Bible Strong

All-in-one Bible study app with Hebrew and Greek lexicons, chronological timeline, Nave's Topical Bible, commentaries, cross-references, audio Bibles, auto-backup, and full offline access with multilingual resources. Open source (GPL-3.0), built by a solo French developer with 10,000+ daily users. Actively maintained on React Native 0.81 with frequent updates.

Soul Rest

A free, open-source web platform aggregating Christian meditations and meditative prayers from 12+ creators — including Christ Centered Tribe, Encountering Peace, Alabaster Co, Rush Podcast, Dwell Bible App, VOUS Church, pray.com, 1MOMENT, Glorify App, Abide Christian Meditation, Soulspace, and Cameron Pak — with a Panic Button for immediate calm, random discovery, and topics spanning anxiety, sleep, healing, purity, and worship. 200+ meditations curated from YouTube, RSS feeds, and direct submissions.

Last Hour Hosting

Christian-owned managed hosting, VPS, email, and cloud services by Shiloh LLC — open-source, privacy-focused, with crypto and barter payment options, data centers in Iceland and Netherlands, ADF partnership, and real human support rooted in faith.

Ezra Bible App

A free, open-source Bible study app focused on topical study through keyword tagging, verse-based notes, Strong's Dictionary with morphological analysis, and Vine's Expository Dictionary — available on Windows, macOS, Linux, Android, iOS, and Chromebooks with hundreds of translations via SWORD modules, with automatic commentary translation in development.

Stello

Stello is a free, open-source desktop app for sending secure and interactive newsletters. Built by a Christian non-profit for missionaries and ministry workers, it encrypts messages on your device and lets recipients view rich, interactive updates in their browser — no accounts or apps needed.

The Bible Plugin

A free, open-source WordPress plugin that embeds a customizable Bible reader into any site, supporting 2,000+ translations via the Bible Brain API with Paratext file support in v2.0 (now available May 2026). Built by missionaries for global digital engagement — localized, strategic, and designed to keep seekers on your site.

Track Bible

A free, privacy-focused Bible reading tracker that lets you tick off chapters at your own pace — no accounts, no ads, no data collection. Open-source progressive web app from Gracious Tech.

Here's My Church

A free, open-source interactive map of over 244,000 Christian churches across all 50 U.S. states, with attendance estimates, denomination filters, language tracking, and community-driven corrections.

Tov: a Bible without noise

A beautifully minimal, open-source, distraction-free Bible app for iOS featuring the Berean Standard Bible, 30,000+ cross-references, reading history, bookmarks, and offline access — completely free with no ads or paywalls. Built by Trent Cowden.

Lessons.Church

Free, open-source church curriculum platform with 1,100+ video-based lessons for preschool through adult from 12+ providers. Built by ChurchApps (Live Church Solutions), serving 14,764+ churches in 130+ countries with companion TV app, presenter mode, comparison pages against paid alternatives, and no login required to browse.

Hai-End-Streaming

Open source Raspberry Pi-based livestreaming solution built by volunteers for church congregations, with 790+ active locations across Europe, a simple web interface anyone can operate, and active development through 2026 (latest release v2.0.3, commits through May 2026).

Bible MCP

An open-source MCP server that gives AI chatbots direct access to accurate, freely licensed Bible text — so Scripture is quoted, not hallucinated. Four tools, over 1,600 Smithery tool calls across Claude Code, Cursor, and Claude.ai, with 98.4% uptime.

The Odin Project

A free, open-source full-stack web development curriculum with over 1.8 million learners. Covers HTML, CSS, JavaScript, React, Node.js, and Ruby on Rails through project-based learning and a 60,000+ member Discord community. Self-funded by donations via Open Collective since 2023. Curriculum GitHub repo has 12,600+ stars and was last updated June 2026.

Biblos

Biblos is a free, open-source semantic Bible search tool powered by BGE-large-en-v1.5 embeddings. Find passages by meaning, study Greek text with the Dodson Lexicon, read Church Fathers commentary, and follow a daily reading plan — all free with no sign-up.

Bible Reader

A free, open-source Bible reading plan tracker and PWA by Ethiopian developer Gadisa Teklu. Choose popular plans or create your own, track progress across all 66 books, and access from any device. Built with Next.js and Supabase.

Gertrude

Gertrude is an open-source parental control suite for Mac, iPhone, and iPad built by a Christian homeschool dad that takes a default-deny approach to internet filtering, with screenshot monitoring, keystroke logging, a safe podcast app for kids, and an iOS app that blocks content loopholes Apple's Screen Time leaves open.

FreeShow

Free, open-source church presentation software for lyrics, scripture, and media — built by a nonprofit serving 14,764+ churches in 130+ countries. Recent updates add WebRTC/Icecast streaming, Canva import, and a companion mobile remote app for iOS and Android.

Scripture App Builder

Scripture App Builder is a free desktop tool from SIL Global that lets Bible translators create customized Android, iOS, and Progressive Web Apps with synchronized text and audio — no programming required. Over 2,500 apps in 1,960 languages with 65 million installs worldwide. Now at v14.1 with built-in Bible version wizard, AI Assistant on both platforms, RSS News Feeds, and App Summary dashboard.

Armorer

A free, open-source minimalist KJV Bible web reader with infinite scroll, instant client-side keyword search, and verse-level deep links — built by a software architect and church deacon who wanted a clean, distraction-free reading experience with no ads, accounts, or overhead.

Prayse

Prayse is a free, open-source prayer journal app that helps you organize prayers into folders, set reminders, journal your thoughts, add voice prayers, and connect with other believers through prayer groups — available on iOS and Android.

GitHaven

Free, open-source Git hosting for Christian developers, running on a Gitea fork and actively maintained by Shiloh — a growing Christian tech company also behind Last Hour Hosting, Remnant Chat, the Touch Grass Show, and the annual Shiloh Echo retreat in North Idaho.

OpenTheo

A free, searchable archive of AI-transcribed Christian audio and video — over 10,000 hours of sermons, lectures, and podcasts from teachers like Steve Gregg, NT Wright, Mike Licona, and Stand to Reason. Interactive transcripts let you click any word to jump to that moment in the audio with real-time highlighting.

Obsidian Bible Reference Plugin

A free, open-source Obsidian plugin (MIT license) that lets you instantly look up and insert Bible verses into your notes — supporting multiple translations (WEB, KJV, NVI, CUV, DRB, UBG, BG, Korean, and Portuguese) across every platform Obsidian runs on. 55k+ downloads, 61 contributors, actively maintained through June 2026.

Bible Brain API

Bible Brain is the free developer API from Faith Comes By Hearing, offering REST endpoints for Bible text, audio, and video in 2,678 languages. Actively maintained with 21 GitHub repos (commits through June 2026) and comprehensive developer documentation. Free for non-commercial use. Ideal for building multilingual Scripture apps and websites.

Disciple.Tools

A free, open-source WordPress CRM designed for disciple-making movements — track contacts, groups, baptisms, and church health with generational mapping, saturation heat maps, file uploads, and unlimited users. Built by Gospel Ambition and deployed by IMB, 24:14, and missions teams worldwide. Latest release: v1.82.0 (May 2026).

LangQuest

An offline-first mobile app that enables native speakers to capture oral Bible translations and linguistic data by voice or text, collaborate with their community to validate translations, and contribute to a global open-access dataset. Built by Frontier R&D (Ryder Wishart, PhD Christian Theology; Ben Scholtens, CTO), now at v2.2.2 with 2,167 commits and 13 contributors. Available free on iOS and Android.

B1 Church

Free, open-source church management platform with mobile app, website builder, digital giving, AI-powered admin search, Claude/ChatGPT MCP integration, check-in, attendance tracking, groups, worship planning, SMS texting, and multi-campus support — built by a Christian nonprofit serving 15,000+ churches worldwide. Formerly CHUMS, now unified as B1 Church.

Freedom Stack - Full-stack Web App Starter Kit

A free, open-source full-stack web app starter kit that takes a no-build, Web Standards approach — pairing Hono, Datastar, Bknd, Sensible UI, and UnoCSS on Bun for approachable, deployable-anywhere development.

Rock RMS

Rock RMS is a free, open-source church management platform by Spark Development Network that handles people management, check-in, giving, communications, digital publishing, and engagement tracking — trusted by 10 of the 12 largest US churches, managing 34.8M+ people records, with AI Agents rolling out in v19 (preview), an active 5,000+ member community, and product roadmap through v20+.

OpenFaith

Open-source, discipleship-first church management software with a universal sync engine for Planning Center and other ChMS platforms. Features a fast table-based interface, sacrament tracking, custom fields for all data types, and an AI-native architecture for natural language interaction with church data.

Christicons

Free, open-source library of 61 hand-crafted Christian SVG icons (MIT-0 license) with npm packages for React and Vue — created by Dimitri Conejo Sanz, the Catholic developer behind Cathopic and EWTN's frontend team. Accepts community icon submissions.

Seed Bible by AO Lab

A free, open-source web platform by AO Lab (501c3) that transforms Bible reading into a shared, real-time experience inside group chats and messaging apps. Features immersive 3D reading, interactive games, Scripture playlists, full-text search, multilingual collaboration, Codex-powered Bible translation tools, Twitch streaming for churches, an incoming Discord bot for scheduled studies, and AI chat integrations — all powered by the Free Use Bible API with 1,000+ translations and 7M+ monthly hits. No downloads, no paywalls, no ads.

LightNet - Media Library Kit

Open-source developer tool from OM (Operation Mobilisation) for building fast, static digital media libraries — now with CMS and analytics integrations — that help ministries share gospel-centered media in any language.

Xiphos

Xiphos is a free, open-source Bible study application for Linux and Windows built on The SWORD Project, offering tabbed reading, fast indexed search, Strong's numbers, pseudo-interlinear display, commentaries, dictionaries, and access to 400+ Bible modules in 150+ languages. Actively developed since 2000 with 41 contributors, 254 GitHub stars, and ongoing commits as of May 2026.

Scribe Scripture

A free, open-source web app that helps you engage with Scripture by typing one chapter of Proverbs each day, cycling through all 31 chapters monthly — turning reading into active, tactile meditation on God's Word.

Bible Bot

A free, open-source AI Christian companion on ChatGPT that helps you explore 100+ biblical topics, find verses, and dig deeper into Scripture — built with grace, truth, and an open-handed spirit. Featured in AP News (2026) and cited by Doxa as the reference framework for evaluating Christian AI apps.

Harvous

A beautifully designed, open-source Bible notes app that helps you capture, organize, and revisit your Bible study with threads, automatic scripture text, and cross-referencing across 7 translations — built to complement your existing Bible app.

Bolls Bible API

A free, open-source Bible API and reading platform offering 100+ translations in 29 languages with endpoints for chapters, verses, search, version comparison, Hebrew/Greek dictionary definitions, and a Reference Tagging Tool — built by a Ukrainian developer with a Sola Scriptura conviction, actively maintained with 590+ commits and 124 GitHub stars, available on web, Android, Windows, and Linux.

YouVersion Platform Services

Free developer platform from the YouVersion/Life.Church team offering REST APIs, SDKs (Swift, Kotlin, JS, React, React Native, TypeScript), fast-track Bible licensing for ~1,500 versions in 1,300+ languages, AI Skills for coding agents, and a full Bible reader you can embed in any app — all at no cost.

route.bible

A free, open-spec tool that turns Bible references into app-agnostic links and QR codes — letting anyone open a passage in their preferred Bible app or browser, with a live Chrome extension that linkifies references across the web.

Paper Bible

A free, open-source web tool by Gracious Tech for printing customized Scripture booklets in 800+ languages — at home or professionally. Founded by Jon Here in Sydney, Australia, it offers four one-click formats and deep layout customization for small groups, missions, personal study, or church handouts.

Bolls Bible

A free, open-source, cross-platform Bible reading app offering 100+ translations in 29 languages with bookmarks, parallel reading, cross-device sync, and customizable themes — built by a Ukrainian developer with a Sola Scriptura conviction, actively maintained with 590 commits and 124 GitHub stars, available on web, Android, Windows, and Linux.

Codex Translation Editor

Free, open-source AI-powered Bible translation editor for desktop. Translators steer while AI learns their style in real-time — supporting any language pair, including ultra-low-resource languages. Built by Frontier R&D (16+ team members, co-founded by Ryder Wishart and Ben Scholtens) in partnership with Biblica and the ETEN Innovation Lab, with 30 releases and 4,855 commits as of May 2026.

StudyChurch

A free web-based platform where small groups collaborate on Bible study lessons online — leaders build studies with embedded questions, members share answers and discuss before meeting in person, and churches manage all their groups from one dashboard.

Remember Me

Free, open-source Bible memory app by Swiss nonprofit Poimena — uses spaced repetition, interactive games, and group campaigns to help 2.2M+ believers memorize Scripture across 320+ translations in 48 languages. No ads, no cost, no limits. Actively maintained with frequent updates across Android (1M+ downloads), iOS, web, macOS, and Windows.

Navigate The Way ✝️

Navigate The Way ✝️ is a free AI assistant for Scripture and theology, built on a conservative reformed evangelical foundation with an open-source AGPL-3.0 system prompt. Created by Ted Hallum of Ligonier Ministries, it uses AO Lab's Free Use Bible API for direct Scripture access and is available on ChatGPT (GPT-5.5 Instant) and Apologist (GPT-5.4 Instant). New in 2026: the Berean Board, an AI-generated small-group review game.

Parabible

A free, open-source, browser-based Bible study tool that lets you read and search the original Hebrew, Greek, and Aramaic texts with morphological parsing — built by James Cuénod, a PhD biblical scholar from South Africa who now serves as Senior AI Translation Technologist at Seed Company.

Lumen

An open-source, AI-powered Bible study companion with an ESV reader, contextual AI copilot, personalized passage recommendations, reading progress tracking, testimony editor, and activity calendar — all in your browser. Built by an xAI engineer.

Gamaliel

Gamaliel is a free, open-source AI Bible reader that answers your Scripture questions with biblically grounded responses. No login needed, funded by ministry, with theological guardrails rooted in the Nicene Creed. Now includes a curated sermon video library from trusted ministries.

Scripture Forge

A free, open-source web app by SIL International for collaborative Bible translation — featuring AI-powered draft generation now used in nearly 500 projects worldwide, Paratext integration, and community checking tools that connect translation teams with language speakers across the globe.

BibleLink

BibleLink is a free, multilingual website plugin by GlobalRize that converts Bible references into hoverable links showing the verse text. Now supports 47 languages and 86+ Bible translations, available as a WordPress plugin or lightweight JavaScript snippet.