Offline First GitHub Repositories (2026) · Open Source Tools

The free open source offline writing assistant assist with grammar, rewriting & tone entirely on your machine.

Bring ThingsBoard to the edge. Filter, aggregate, and compute locally to cut bandwidth costs and reduce latency, pushing intelligence to the field while keeping the cloud in sync.

A secure, lightweight, & offline password manager for Android

Transport and coordination layer for the disconnected edge. Build apps, agents, and devices that discover peers, communicate securely, and coordinate across BLE, Wi-Fi Direct, internet, Reticulum, and Nostr.

AI-powered flashcards app built for serious daily study on iOS, MacOS, Android, and the web. Use it to prepare for exams, learn vocabulary, memorize technical terms and facts, improve your material with AI, and review with spaced repetition.

Offline cyber security agent for your apps and AI coding tools. Open R&D: measured in public, improved every release.

Offline dictation and read-aloud for the desktop.

Modern, secure, offline-first personal finance and expense tracking mobile application built with React Native Expo

Android companion for Markdown vaults stored on GitHub, with Obsidian rendering, offline reading, conflict-safe editing, and an optional desktop sync helper.

Data over sound for React Native. Two phones pass bytes through the air with no network, no pairing and no account - a Nitro module wrapping ggwave, with the audio layer it doesn't have.

Getman - Open Source Postman Lightweight Alternative written in Rust.

Apple Music-inspired offline music player for Android — local library, no account, no ads

Unofficial Android app for FMHY. The whole wiki on your phone, searchable, with bookmarks, and it works offline.

Free, ad-free Android PDF toolkit: turn photos, Word, PowerPoint and EPUB into PDFs; merge, split, reorganize, rotate, edit, sign, watermark, number, compress, flatten and redact PDFs. Works offline, no tracking, no account, no uploads. OCR in English, French, Spanish and Hindi.

Private, offline library and player for your own adult collection. Rust, egui, GStreamer, SQLite. No account, no telemetry. Linux, 18+.

A fast, private expense tracker for Android: log a spend in two taps, see what's safe to spend today, and plan ahead. Data stays on your phone.

Plain-text accounting for Beancount on Android. Runs the real Beancount and Fava on your phone. No account, no telemetry.

Offline AI narration studio for Android: turn scripts into natural speech and clone your voice, all on-device. No cloud, no account.

DashCraft: BI dashboards and data models; an open-source, clean-room Power BI file explorer and report renderer, written from scratch in Rust. Open PBIX, PBIP, PBIT, TMDL and model.bim offline on macOS, Windows and Linux. No Power BI Desktop, no VM, no cloud login.

Minimal open-source weekly planner and to-do list. Free, MIT, self-hostable.