NanoHttpd is a lightweight HTTP server designed for embedding in other applications. It's only one Java file, in two "flavors", one strictly Java 1.1 compatible, and one at "current" standards. It supports GET, POST, PUT, HEAD and DELETE requests, and supports file uploading with very small memory overhead. Temp file usage and the threading model are easily customized.
DEMUX Framework enables Java developers to build modular, cross-platform applications which can run on desktop, Web, and mobile and embedded devices. It is based on OSGI and supports creating JavaFX desktop applications, mobiles apps (Android, iOS, Windows), and Web applications.
SaluSafe is an encrypted email, chat, and file storage and sharing system. Your email and files are highly encrypted end-to-end, and cannot be intercepted by any third party. It was built from the ground up for security via strong cryptography, and is not just another security wrapper on top of an existing email solution.
CT-gui is a touch-friendly GUI toolkit which can be used on the Linux desktop and on Android devices. Development can be done quickly and easily on a Linux box, then ported to an Android tablet or phone. For graphics, only OpenGL or OpenGL ES is used. For audio, ALSA is used for Linux and OpenSL ES for Android. As you might expect, the Android SDK and NDK should be installed on your system. Two demo projects called CT-synth and CT-farfisa are included, which are a polyphonic synthesizer with about 20 built-in patches, and an organ with many sounds. These can be played using the mouse or your fingers, or with an attached MIDI keyboard.
Serv-U FTP Server is a Web, mobile device, SFTP, and FTPS file transfer server. It handles hundreds of GBs per day and thousands of users. The advanced Web interface permits transfer of multiple, large files in a single operation. It supports mobile devices including iPad, iPhone, and Android, as well as IPv6, FIPS 140-2, and more.
Jabylon is an extensible Web-based translation management software. It is meant primarily as a tool to help translators and developers manage and create translations. Jabylon supports translations of Java, Android, and iOS applications. It features tight integration into various source code management systems, a feature-rich Web editor, and a REST API to upload or download translations. It can also be used to offer your user community an easy way of contributing translations for new languages or suggest changes to existing translations.