I recommend Paint.net because the GIMP GUI is too complicated for me and it might be for you too. Pain.t net is pretty cool with a lot of features. (Not as much as GIMP or Photoshop but still good) And it's pretty quick loading.
TechTarget provides enterprise IT professionals with the information they need to perform their jobs - from developing strategy, to making cost-effective IT purchase decisions and managing their organizations' IT projects - with its network of technology-specific Web sites, events and magazines.