Commercial products Visual Studio and Borland Delphi/JBuilder, and free Sharpdevelop have a strong competitor in the IDE-market: X-Develop. Currently only available as preview download, X-Develop promises to be a very strong competitor. Already supported languages are Java, J# (up to 2.0 including generics), C# (up to 2.0 including generics), VB.NET, but it’s language plug-in API opens the door for others as well.
One very interesting (Java) feature is the back-in-time debugger, that allows to step through the code up to the point where things went bonkers.
Developers taking their work back home might be glad to hear that X-Develop is fully compatible with VS.NET SLN-files, including VS.NET 2005.
X-Develop is created by the same people that bring us CodeGuide, an IDE for Java and JSP.