We were looking at a demo of an agile-project tool yesterday. The tool itself was pretty good, but I just kept thinking about how I could write it myself and how much fun that would be. Then, once I looked at the cost of the license, I had to restrain myself from taking a week off and writing a competing tool that I could release as open source or sell at half the price.
Oh build-vs-buy, you always throw a bucket of ice water in the face of my reveries!