Well, if you are, consider yourself lucky to read this blog. I was tired of windiff, and I started looking for something more interesting, which could also be integrated with my versioning control environment (TortoiseSVN). I stumbled upon WinMerge, a very nice opensource software which has all the features from windiff  plus a sober, functional GUI. Last, but not least, it perfectly integrates with TortoiseSVN. In a few words, a MUST have.