This is the tool I'm most proud of to date. We were doing a complicated sprite based skateboarding game but had absolutely no sprite based animation tools to work with. This tool allowed us to script out animation sequences and play them back in real time with a few simple clicks. It was vital that we reused as many frames as possible to save memory, so many frames from the original animation sequences were removed or shared. Our sound effects were also scripted in with the animations by assigning a playback id at the appropriate frame from within the tool. The character was rendered with wacky colors that were palette swapped out to make several unique looking characters from the same animation sets.