What is My One Must-Have Windows Mobile Tweak/Hack?

It's not so much which single Windows Mobile tweak/hack I can't live without, but more like which tweak/hack utility I've found to be the most helpful over the years. That would be Tweaks2k2 which is currently at v3.30.0. The software has been repeatedly honoured over the years in the Best Software Awards, from getting nomiated to making it to the finals to winning three years in a row.