I added the ish bit because while it may not cost you any money, it may cost you time.

The IE team have launched a competition.  They are looking for the best Add-on to IE7.

The prizes are pretty good:

  • Grand Prize: $2500 + A Trip for 2 to Mix07
  • First Prize: $2000
  • Second Prize: $1000
  • Third Prize: $500
  • Honorable Mention: A Zune

If you are interested in building an add on for IE...

There are plenty of resources for creating add-ons within IE. The best place to start is the IE Developer Center on MSDN where you can find all sorts of information. In the next couple of weeks, we’ll be adding more samples and additional documentation on how to create add-ons. About a year ago, Eric Lawrence wrote about how to write an add-on on the IE blog, that’s also a great resource. Additionally, the IE MSDN Forums provide a great place where you can ask questions and get answers quickly. The forum is monitored by the community and the IE team, so you may be able to get a little extra help there.