my self i use MAC when i am at work (macbook)
Word
Excel
IcalSpanning Sync (syncing software to share/import/export info two ways from Ical and Google Cal)
Imail(hooedup to my Gmail, work email, hotmail, and few other email i rarely use)
Itunes( if the Director wants a tempo or something right away, i got gazillion of sound effects/musics on my 500GB External Harddrive)
Vectorworks (within next 2 weeks, the Department is getting 10user CD from the VWorks)
Google Sketchup(quick Drawing apps, if you dont to buy a 600-2,000 dollar program it can read saved file made by Vectorworks (DMG),
http://sketchup.google.com/ )
if any wireless then the following applies:
Firefox(research)
Itunes (tempo musics)
i think thats it.... so far