Horology is a date/time calculator that supports all the built-in calendars for iOS, and allows you to perform various types of calculations or conversions of date and time values. You can find the difference between two date/time values, calculate a date/time by inputting a start date/time and add or subtract some arbitrary amount, or convert a value from one unit type to another (e.g., years to seconds).
KeyBoards is a cross-operating system platform that synchronizes short text messages or URLs. It is designed to be used for composing messages on a desktop system with a real, comfortable keyboard, and then sending them to a mobile device for transmission as an SMS. It is ideal for use with non-Latin character sets.
LibRCrypt is an Objective C library for complex data encryption based on Rubik's Cubes. The idea's pretty simple: If you represent data as the squares on a Rubik's Cube, you can apply transformations to the data and get back encrypted data, all of which is commutatitive. Just as a Rubik's Cube can be solved if you know all of the moves, this data can be "unwound", so to speak, if you know all of the transforms applied, but the encryption is even deeper than that. A cube can only cover (9 squares per face x 6 faces) 54 significant bits of data. Therefore, compressed data must be composed of multiple (even thousands) of Rubik's Cubes.
J2ObjC is a tool from Google that translates Java code to Objective-C for the iOS platform. It enables Java code to be part of an iOS build, as no editing of the generated files is necessary. The goal is to write an app's non-UI code (such as data access or application logic) in Java, which can then be shared by Web apps using GWT, Android apps, and iOS apps. J2ObjC supports most Java language and runtime features required by client-side application developers, including exceptions, inner and anonymous classes, generic types, threads, and reflection. JUnit test translation and execution are also supported.
C4 is a creative-coding framework which lets you build expressive user experiences and create works of art on iOS. It gives you the power of the native iOS programming environment with a simplified API which lets you get down to working with media right away. It lets you build artworks, design interfaces, and explore new possibilities of working with media and interaction.