Open Source Software for Android
Cryptomator
Cryptomator is a simple tool makes your cloud storage trustworthy. With Cryptomator, you can encrypt your data quickly and save it to your favorite cloud services provider. The tool is released as free and open source software under the MIT License. Allowing you and other developers to verify and build upon the source code, to further strengthen and improve the application.
Authy
Authy is a two-factor authentication (2FA) for protecting yourself online. With Authy you can defeat cyber criminals & avoid account takeovers with stronger security. Authy is created by Twilio and avalible for Android, iOS and Google Chrome. It integrates with many third-party services such as Facebook, Amazon, Google, Microsoft, Dropbox and many more.
Termius
Termius is the SSH client that works on both Desktop and Mobile. The application lets you organize hosts into groups while allowing share settings across users. Terminus uses end-to-end encryption to ensure your data remains safe and secure, while keeping connection and command history.
Firefox Lockwise
Firefox Lockwise is a password manager for the Firefox web browser and your mobile Android and iOS device. The software feature strong 256-bit encryption that lets you store you password safely. Firefox Lockwise lets you securely access the passwords you've saved in Firefox from anywhere using Face/Touch ID or master password.
TV-Browser
TV-Browser is an TV listings application that gets the daily TV program from the internet and shows it nativley in a neat user interface. The software runs on every system and platform with the Java runtime environment installed. With TV-Browser you can manage your TV listings your way, thanks to TV-Browser built in theming and plugin support.
openHAB
Empower your smart home with openHAB's vendor and technology agnostic automation software for your home. openHab's Home Automation Bus can be deployed on premis and connects to a wide variety of third-pary devices and services. In total, openHAB supports over 200 different technologies and thousands of devices. As openHAB is released as open-source software you are free to contribute to the project, and build extensions that suits your home and the third-party technologies you want to use.
Wikipedia
Wikipedia is the worlds largest free online encyclopedia. The platform contains content created, edited and currated by volunteers around the world. Wikipedia is managed and hosted by the Wikimedia Foundation and the data is provided under the Creative Commons Attribution-ShareAlike 3.0 Unported License (CC BY-SA).
OutSystems Now
OutSystems Now is a mobile application that let developers to connect to their own personal or corporate OutSystems environment. With OutSystems Now developers can accelerates release cycles, by using the application to immediately test the applications they’re creating with OutSystems platform. The application also provides a way for testers to provide feed-back for beta tests. right within OutSystems Now.
Kali NetHunter
The Kali NetHunter project is an open source penetration testing platform for Android (Nexus devices). The operating system is joint effort between the Kali community member "BlinkyBear" and Offensive Security. With Kali NetHunter you can perform penetration testing on the go, with various support for attacks like Wireless 802.11 frame injection, one-click MANA Evil Access Point setups, HID keyboard attacks, as well as BadUSB MITM attacks. Kali NetHunter currently supports Nexus 5, Nexus 6, Nexus 7, Nexus 9, Nexus 10, and OnePlus One.