Open Source Christian Projects | Collaborate & Innovate

Remember Me

Free, open-source Bible memory app by Swiss nonprofit Poimena — uses spaced repetition, interactive games, and group campaigns to help 2M+ believers memorize Scripture in 48 languages. No ads, no cost, no limits.

Free Use Bible API

A free, open-source JSON API by AO Lab serving 1,000+ Bible translations with no API keys, no usage limits, and no copyright restrictions — built on a conviction that Scripture should be freely given.

Here's My Church

A free, interactive map of Christian churches across all 50 U.S. states with attendance estimates, denomination filters, and community-driven corrections.

Track Bible

A free, open-source Bible reading tracker from Gracious Tech. Tick off chapters at your own pace in this simple, private web app — no account, no ads, no schedule required.

GitHaven

Free, open-source Git hosting for Christian developers, built on Gitea and hosted by Shiloh — a team reforming tech in Jesus' name.

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, and unlimited users. Built by Gospel Ambition and deployed by IMB, 24:14, and missions teams worldwide.

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.

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, engagement tracking, and more — trusted by 10 of the 12 largest US churches and managing 30.5M+ people records.

Bible Strong

All-in-one Bible study app with Hebrew and Greek lexicons, chronological timeline, Nave's Topical Bible, audio Bibles, auto-backup, and full offline access with multilingual resources. Open source, built by a solo French developer with 10,000+ daily users worldwide.

Soul Rest

A free, open-source web platform gathering 500+ Christian meditations and meditative prayers from creators like Christ Centered Tribe, Encountering Peace, Alabaster Co, Rush Podcast, VOUS Church, and pray.com — with a Panic Button for immediate calm, random meditation discovery, and content spanning anxiety, sleep, healing, and worship.

Hai-End-Streaming

Open source Raspberry Pi-based livestreaming solution built by volunteers for church congregations, with 790+ active locations across Europe and a simple web interface anyone can operate.

Last Hour Hosting

Christian-owned web hosting, VPS, email, and cloud services by Shiloh LLC — open-source, privacy-focused, with crypto payment options and data centers in Iceland and Netherlands.

Type the Word

Type the Word is a free, open-source web app that lets you type through the Bible verse by verse — tracking your accuracy, progress, and consistency while you meditate on Scripture across nine translations.

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 — designed for the realities of remote field work where internet is unreliable.

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.

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 a PhD biblical scholar working in Bible translation technology.

Gertrude

Gertrude is an open-source parental control suite for Mac, iPhone, and iPad that takes a default-deny approach to internet filtering, blocking everything except parent-approved sites and apps, with additional tools for screenshot monitoring, keystroke logging, and a safe podcast app for kids.

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, and UnoCSS on Bun for approachable, deployable-anywhere development.

Keep in Touch (kit)

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

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.

The Bible Plugin

A free, open-source WordPress plugin that embeds a Bible reader into any site, supporting 2,000+ translations via the Bible Brain API. Built by missionaries for missions — localized, strategic, and designed to keep seekers on your site.

Harvous

A beautifully designed, open-source Bible notes app that puts your study notes first — organize thoughts in threads, auto-link scripture references, cross-reference passages, and share spaces with your small group. Built by a design engineer whose 10-year faith journey inspired Proverbs 25:2-driven toolmaking. Free to start, web-based with native apps in active development.

Scribe Scripture

A free 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.

The Odin Project

A free, open-source full-stack web development curriculum with 1.7M+ learners. Covers HTML, CSS, JavaScript, React, Node.js, and Ruby on Rails through hands-on projects and community support.

Lumen

An open-source, AI-powered Bible study companion that helps you ask questions about Scripture, get personalized passage recommendations, and track your reading progress — all in your browser.

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.

OpenTheo

A free, searchable archive of AI-transcribed Christian audio and video content featuring thousands of hours from teachers like Steve Gregg, NT Wright, and Stand to Reason. Interactive transcripts let you click any word to jump to that moment in the audio.

Armorer

A free, open-source minimalist KJV web reader with infinite scroll, instant keyword search, and verse-level deep links — built by a software architect and church deacon who wanted a clean, distraction-free alternative to cluttered Bible sites.

Bible Reader

Free, open-source web app for building a consistent Bible reading habit. Choose from popular plans or create your own, track progress across all 66 books, and access it on any device. Built by an Ethiopian Christian developer.

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 2,500+ languages. Ideal for building multilingual Scripture apps and websites.

AndBible

A free, open-source Android Bible study app with 1,500+ documents in 700+ languages, Strong's concordance, split-screen commentary, offline reading, and community-driven development — no ads, no cost, no compromise.

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 — with immersive 3D reading, interactive games, Scripture playlists, and a free Bible API with 1,000+ translations. No downloads, no paywalls, no ads.

Christicons

A free, open-source library of 56 hand-crafted Christian SVG icons (MIT-0 license) for websites, apps, and ministry projects — created by Dimitri Conejo Sanz, the Catholic developer behind Cathopic and EWTN's frontend team.

Obsidian Bible Reference Plugin

A free, open-source Obsidian plugin that lets you instantly look up and insert Bible verses into your notes — supporting multiple translations across every platform Obsidian runs on.

Lessons.Church

Free, open-source church curriculum platform offering 700+ video-based Bible lessons for all ages — from preschool through adult — with automatic scheduling, classroom TV apps, and downloadable leader guides, all at zero cost.

Scripture App Builder

Scripture App Builder is a free desktop tool from SIL Global that lets Bible translators create customized Android and iOS Scripture apps with synchronized text and audio — no programming required. Over 2,500 apps in 1,960 languages with 65 million installs worldwide.

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.

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 API for developers.

BibleLink

BibleLink is a free, multilingual website plugin by GlobalRize that converts Bible references into hoverable links showing the verse text. Supports 40+ languages and 60+ Bible translations, available as a WordPress plugin or lightweight JavaScript snippet.

FreeShow

Free, open-source church presentation software for lyrics, scripture, and media — built by a nonprofit, used by thousands of churches on Windows, macOS, and Linux.

Paper Bible

A free, open-source web tool for printing customized Scripture booklets in 800+ languages — perfect for small groups, missions, personal study, or church handouts. Made by Gracious Tech, a Christian non-profit.

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, and Hebrew/Greek dictionary definitions — built by a Ukrainian developer with a Sola Scriptura conviction.

Gospel Onchain

The entire KJV Bible stored directly on the Optimism blockchain — searchable, immutable, and censorship-proof. Read Scripture on-chain, confirm verses, and search by chapter or keyword.

Scripture Forge

A free, open-source web app by SIL International for collaborative Bible translation — featuring AI-powered draft generation, Paratext integration, and community checking tools that connect translation teams with language speakers worldwide.

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 in partnership with Biblica and the ETEN Innovation Lab.

Prayse

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

B1 Church

Free, open-source church management platform with mobile app, website builder, digital giving, check-in, attendance tracking, groups, worship planning, and multi-campus support — built by a nonprofit serving 14,700+ churches worldwide.

fetch(bible)

A free, open-source Bible translations platform by Gracious Tech providing unrestricted access to 444+ translations via CDN, client library, embeddable app, and web enhancer — no API keys, no limits, no registration.

Biblos

Biblos is a free, open-source semantic Bible search tool that finds passages by meaning using AI embeddings, with Claude-powered summarization, Greek text analysis, and Church Fathers' commentaries.

Ezra Bible App

A free, open-source Bible study app focused on topical study through keyword tagging, verse-based notes, and Strong's Dictionary support — available on desktop (Windows, macOS, Linux) and Android with hundreds of translations via SWORD modules.