These links are to developer tools that I myself use, at least occasionally. I am not much into C and C++ or any of the cool languages that very very smart people use. I like BASIC and C#.
Microsoft Developer Tools
.NET
- Mono C# compiler and rumtime
- RemObjects C# and Oxygene Pascal compiler
- Xamarin C# compiler and IDE
- MonoDevelop IDE
- SharpDevelop IDE
- Eto Forms
Java
Assembler
Pascal/Object Pascal
BASIC