Eric is a full featured Python and Ruby editor and IDE, written in python. It is based on the cross platform Qt gui toolkit, integrating the highly flexible Scintilla editor control. It is designed to be usable as everdays' quick and dirty editor as well as being usable as a professional project management tool integrating many advanced features Python offers the professional coder. eric4 includes a plugin system, which allows easy extension of the IDE functionality with plugins downloadable from the net.
2. Komdo Edit
MonoDevelop is an open source integrated development environment for the Linux platform, Mac OS X, and Microsoft Windows, primarily targeted for the development of software that uses both the Mono and Microsoft .NET framework. MonoDevelop integrates features similar to that of NetBeans and Microsoft's Visual Studio such as automatic completion, source control integration, and an integrated GUI and Web designer. MonoDevelop integrates a Gtk# GUI designer called Stetic. It currently has language support for C#, Java, Boo, Visual Basic.NET, Oxygene, CIL, Python, Vala, C and C++.