JGame is a 2D game engine that makes multi-platform development easier. It runs on the Java JRE 1.3+ platform with optional OpenGL (JOGL) enhancements, the J2ME (MIDP2.0/CLDC1.1) mobile platform, and the Android (2.1+) platform. JGame features sprites with automatic animation and collision detection, a tile-based background with easy sprite-tile interaction facilities, automatic scaling, sound, game state, persistent storage, and game options. The engine provides an enhanced graphics API with a fallback to simpler and more efficient graphics on J2ME and plain JRE. A patched version of the JBox2D physics engine that runs on all platforms is included.
DynChap provides an additional pseudo hardware token based authentication layer for PoPToP virtual private networks. The authentication uses the user's mobile phone to generate a hash that needs to be entered along with the user's password in a custom connection dialogue. Upon connecting, the VPN verifies the authenticity of the hash. The hash is generated from a serial (by default 32 printable characters) stored in the J2ME based mobile phone and the current time; the VPN server compares this hash against the serial and current time, minus or plus a small deviation (by default 2 minutes). If the username, password, and hash match, access is granted and the custom dialer is closed, the connection can now be controlled like an ordinary VPN connection.
YourTube is a YouTube video downloader for mobile phones that support J2ME. Its main features are the ability to search YouTube videos, support for multiple video formats (MP4, FLV, 3GP), support for background downloading, and a download queue. The minimum requirements are MIDP-2.0, CLDC-1.0, and JSR 75 (File Connection API).