These are a few small features the should help with common workflow senarios. The idea of an IDE is that one should not have to directly invoke the compilers or operating system services like a file manager. However, sometimes you just need to browse your source folders in internet explorer. Hence, I have added three new context menu items that launch new explorer windows.
Two of the new items are the same context menu item in different locations. If you right click on a source file in the project panel or a tab in the text editor, you get an option labeled "Open Containint Folder in Explorer." Like the name suggests, selecting this menu item opens a new explorer window with the folder containing that source file. You can then manipulate these files from explorer as you see appropiate.

The other feature is for projects. If you right click on a project in the project panel you get a menu item labeled "Open Output Folder". This will open the folder where the projects compiled assemblies get placed. In most cases this is "bin\Release" or "bin\Debug" depending on the projects active build configuration.

These features are simple, and by no means make SharpDevelop a "must have" IDE for anyone. However, it is overall attention to little details like this that make a good program a great program.