SpicIE

SpicIE is a framework which allows you easily to extend Internet Explorer 7/8 with your own plugins.

SpicIE wraps/hides the IE COM extension interfaces and makes it easy to develop browser extensions in managed programming languages.
SpicIE is designed for simplicity. The initial creation of an Internet Explorer plugin with SpicIE takes only minutes until you have a runnable, debuggable code base which you can extend with your own functionality. There are lot of scenarios where browser plugins could be useful. SpicIE lets you develop your own browser functionality comfortable with minimal technical efforts.