Voca is a vocabulary trainer for foreign languages. It allows you to create and manage your own word lists and share them online. You can make word lists for any language or for other things you want to memorize. It lets you do different types of exercises, including grammar, pronunciation, and picture tests. It lets you take tests with open answers, self-check, or multiple choice. Voca has support for multiple translations of a single word.
The Dextop application framework allows you to create Rich Internet Applications based on .NET/Mono and Sencha Ext JS. It has proven to be useful for online business applications. It features a desktop-like Ext JS frontend, simplified client-server communication, a stateful programming model, real-time updates and notifications from the server, automatic column model generation, automatic store model generation, and automatic form generation.
MBase is a .NET-oriented meta-programming framework. It is designed for rapid development and high quality implementation of custom programming language compilers, but can also serve as a robust and flexible embeddable scripting engine. Applications are not limited to .NET platform, since MBase can be used to implement compilers targeting other platforms - JVM, native assembly, C, etc.
MonoDevelop is a GNOME IDE primarily designed for C# and other .NET languages. intelligent code completion attempts to complete type, method, and field names as you're typing. The IDE automatically gets the class information from your source code files and from the libraries referenced in your project. A class viewer allows you to list the classes in your project, their methods, and properties. Your namespaces are also tracked to keep the classes separated. A powerful add-in engine, a modular API, and a complete set of extension points provides a seamless platform upon which to build your own development tools.
DeveelDB is an embedded SQL database management system for .NET, implementing all the features of the SQL92 specifications (transactions, triggers, procedures, functions, etc.). The aim is to provide .NET and Mono developers with a fully functional, powerful, and embeddable database system that can be used in several contexts, managing small to large amounts of data.