Open Source Software for Android
PocketMaps
With PocketMaps, you can store free offline map on your android device. The project is free and open-source and uses OSM data, Mapsforge-vtm and Graphhopper open source API.
ZeroTier
ZeroTier is a global area network provider that enable the creation of secure networks between on-premise, cloud, desktop, and mobile devices. Allowing you to securely connect to any device, anywhere. ZeroTier combines the capabilities of VPN and SD-WAN to simplify network management, allowing organization to connect team members securely withing a decentralized workforce.
OxygenOS
OxygenOS is a mobile operating sytem for the OnePlus series of Android phone. It provides a refreshingly simple user interface that allow you to navigate more efficiently with intuitive gestures to access what's important, and enjoy a more personalized user experience. OxygenOS is co-developed with the open source community and released as free and open software.
Git
Git is a free and open source distributed version-control system for tracking changes in source code during software development. The tool is created by Linus Torvalds, the creator of Linux, and is used by virtually every software project today. With Git, developer can track changes in any sets of files in a project and coordinate the team to develop in a non-linear workflow to achieve maximum efficiency.
Replicant
Replicant is a fully free and open source Android distribution designed for freedom, privacy and security. Replicant replaces all proprietary Android components with free and open counterparts allowing you to be in control of your operating system, its software and your personal information and data.
OsmAnd
OsmAnd is a map and navigation application for Android and iOS that uses data from OpenStreetMap. OsmAnd provides offline navigation of maps and tools to better track them. Features provided found in the OsmAnd application include viewing points of interest, creating and managing GPX tracks, using contour lines visualization and altitude info, a choice between car navigation, cycle navigation or directions in the pedestrian mode, and OSM editing.
Tor Browser
Tor Browser is free and open-source software that guarantees anonymity online through the onion router. It enhances your security and safety while using the internet and is a favorite choice for people who want to browse the web anonmously. The Tor Browser helps you anonymize publishing, web surfing, instant messaging and other functions, using the TCP protocol.
FreeOTP
FreeOTP is a token-base two-factor authentication application available for Android and iOS. The application provides implementations of HOTP and TOTP which means that there is no proprietary server-side component used to generate two-factor authentication. Tokens used for authentication can easily be added by simply scanning a QR code.
Sailfish OS
Sailfish OS is a European developed mobile operating system that offers exlusive licensing model for local implementations. Sailfish OS provides a deeper level of security including features, such as Mobile Device Management (MDM), fully integrated VPN solutions, enterprise WiFi, data encryption, and better and faster performance. Allowing you to enjoy a privacy focused and secure operating system for your mobile devices.
Signal
Signal is a cross-platform encrypted messaging application that has a strong focus on privacy. The application is developed by Signal Messenger LLC and provides users with features like one-to-one and group messages, which can include files, voice notes, images and videos. The software is famous for being used by the whistleblower and privacy advocate Edward Snowden who once said "I use Signal every day, it is the most scalable encryption tool we have".