iconcertcal

i like this:

http://www.iconcertcal.com/

it's a…

iConcertCal is a free iTunes plug-in that monitors your music library and generates a personalized calendar of upcoming concerts in your city.

[my apologies if this is redundant]

I LOVE that plug-in. It catches shows at venues whose schedules I don't follow regularly. Sometimes, it also helps me catch errant songs in my itunes library - it reminds me of bands from whom I didn't think I had any music.