Android Apps to Open Source

andOTP is a free and open-source Two-Factor Authentication (2FA) application for Android devices. It enables users to generate time-based (TOTP) and HMAC-based (HOTP) one-time passwords securely, enhancing the security of their online accounts.

FreeOTP is a free and open-source two-factor authentication application for generating one-time passwords, supporting both HOTP and TOTP standards. It enhances online security by providing an extra layer of protection beyond just passwords.

Electrum is a free and open-source Bitcoin wallet renowned for its speed, low resource usage, and strong security features. It runs on various operating systems and supports hardware wallets for enhanced protection.

Blokada is a free and open-source application for Android and iOS, designed to block advertisements, trackers, malware, and other unwanted content across your entire device. It offers system-wide protection without requiring root access and provides advanced features like custom DNS configuration and VPN functionality for enhanced privacy.

Brimir is an open-source, self-hosted helpdesk ticketing system designed to streamline customer support operations. It provides a centralized platform for managing customer inquiries, tracking support tickets, and collaborating with team members. Brimir aims to be a flexible and customizable solution for businesses of all sizes.

Gitter is a free and open-source instant messaging and chat service designed specifically for developers and users of GitHub projects. It provides real-time communication within the context of software development teams and communities.

Silence.im is an encrypted text messaging application for Android that prioritizes user privacy and security. It allows for secure communication via SMS/MMS, offering end-to-end encryption when communicating with other Silence users. The app is open-source and ad-free, providing a simple yet powerful platform for private mobile messaging.

Tint Browser is a discontinued open-source web browser for Android 4+ focusing on customization, privacy, and a lightweight design. It offered a tabbed interface, bookmark management, and built-in ad blocking, catering to users seeking an alternative to mainstream browsers with more control.

Apertium is a free, open-source machine translation platform utilizing rule-based methods. It provides versatile translation capabilities, including online translation, browser integration, and potential for localized content.

Shadowsocks is an open-source, lightweight SOCKS5 proxy designed to bypass internet censorship. It provides a secure tunnel between your device and the internet, helping users access blocked content and surf anonymously by encrypting traffic and making it appear as regular HTTPS traffic.

ChatSecure is a privacy-focused messaging application for iOS that leverages the robust and decentralized XMPP protocol. It offers strong end-to-end encryption using OTR and OMEMO, ensuring confidential communication.

Minds is an open-source and decentralized social networking service dedicated to online freedom, privacy, and monetization for content creators. It champions free speech and offers a platform that rewards users for engagement through a points and token system.

Butter Project is a discontinued open-source application suite designed for streaming video content over the BitTorrent protocol. It allowed users to watch movies and videos directly from torrents without needing to download the entire file, leveraging peer-to-peer technology for media consumption.

Tutanota is a leading open-source email service offering robust end-to-end encryption and enhanced privacy. It provides a secure platform for communication and calendar management, accessible via web and dedicated applications.

CSipSimple is a powerful and highly configurable open-source VoIP application for Android devices, enabling high-quality voice and video calls, messaging, and integration with various SIP providers. It prioritizes security and offers advanced features for both individual users and businesses.