Open Source Android Apps

Open-source browser with Gecko engine, supporting HTML add-ons and providing privacy features like Enhanced Tracking Protection and third-party cookie blocking.

Cross-platform, free media player supports multimedia files, DVDs, streaming, offers hardware acceleration, 4K, lossless audio, and more.

Free and open-source office suite with advanced word processing, spreadsheets, presentations, vector graphics, math formula editor, and database tools.

Open-source password manager with AES-256 encryption and device sync. Store and access encrypted logins across platforms like iOS and Android.

Cross-platform email client providing POP/IMAP support, robust filtering, multiple accounts, and chat. Extendable via add-ons with RSS/Atom, etc.

An encrypted messaging app focused on privacy, supporting texts, calls, photos, videos, files, and group chats, with no ads or trackers.

Free open-source tool offers secure, end-to-end encrypted file and message sharing over local networks across major desktop and mobile operating systems.

Fast, secure browser with built-in ad block, privacy controls, and global tracking protections. Optimizes data, speed, and battery life.

Media center supporting movies, series, YouTube, and smartTV casting via DLNA/Chromecast. Offers HD, subtitles, add-ons, with no registration needed. Notice of new episodes.

Discover and install FOSS Android apps with ease. Privacy-focused, ad-free, and no registration required, F-Droid offers a lightweight alternative.

Secure Swiss-based email with end-to-end encryption and zero third-party access. Available across devices, offering a free version to promote privacy.

On-premises file sync, universal access, integrated collaboration, real-time communication with privacy and data control focus.

CoMaps is a new community-driven map app project born out of the desire to create a truly open, transparent, and community-focused navigation app.

Open source note-taking app with Markdown support, to-do integration, and synchronization with cloud services like Dropbox and OneDrive.

The Tor software protects you by bouncing your communications around a distributed network of relays run by volunteers all around the world: it prevents somebody watching your Internet connection from learning what sites you visit, it prevents the sites you visit from learning...

A secure collaboration app with end-to-end encryption and interoperability across web, desktop, and mobile. Includes chat, voice, and video calls.

Lightweight and open-source app for YouTube, PeerTube, SoundCloud, and more. No Google Account needed, supports 4K and background audio streaming with downloads.

Open-source suite for editing documents, spreadsheets, presentations, forms, and PDF files with co-editing modes, plugin support, AI assistant, and integration across 40+ platforms.

Federated and open-source social network with no ads, 500-character limit, custom emojis, and content warnings, emphasizing privacy and personal interaction.

Free content, multilingual online encyclopedia written and maintained by a community of volunteers through a model of open collaboration, using a wiki-based editing system.

Open-source media player supporting Linux to iOS, highly customizable with plug-ins, supports 4K and diverse formats, privacy-centric and ad-free.

Swiss-based VPN that ensures online privacy with a high-speed network, advanced encryption, and no-logs policy, offering a free version. Supports multiple platforms and unblocks content worldwide.

Privacy-first AI assistant with zero-access encryption, no logging or profiling, open-source code, and user-controlled conversations, subject to GDPR regulations.

Facilitates device communication, enabling notifications, SMS replies, file sharing, and remote control across multiple operating systems.

Free multi-platform software for task management, time tracking, and personal project management. Seamless integration with Jira, GitHub, and GitLab.