My list has changed quite a bit now that I have multiple machines with dedicated purposes.Windows 8.1 Pro x64 + Classic Shell (Windows 10 once drivers roll out and Oculus support)
Chrome - Adblock - PDF Viewer
Daemon Tools (I still use this by pure habit)
Adobe CS6 Suite
Vegas Pro 12
Logitech Gaming Software
Go to Services and disable a ton
A lot of things from my previous list still exist but I've limited a lot of installs by adding a 512GB SSD and leave certain things installed. Steam is one good example, as is FRAPS (which I don't normally use). UltraISO, Handbrake, and the like I move over to my server to free up work time on my main rig and because I can remote into it.