I love to install software everday, its just amazing the amount of stuff released everyday on the internet and the uncountable challenges to break some protections, during all of my years as a computer lover, whenever i reinstall windows, or switch to a new box, these are a list of must have apps, at list for me, post yours!
Avast antivirus - free , great, it wont lag your box like norton
Foxit reader - free, better than heavy acrobat reader, open pdf files in 0.01 secs
Google toolbar for ie - free, simple, perfect
Bulk rename utily - free, great for mass rename files , i love it because i take thousands of pics and this help me to keep everything organized
Itunes - owner of an ipod? I tried ephod and poddox, both sux, just give it another chance to apple and you will end loving itunes, just like i did, the other ones mentioned are not flawless.
pdffactory pro - simple & great to make convert anything into pdf on the fly
picasa 2 - google's image software, this is PERFECT for those who are not experienced with image managing, just like me - ps: you cant use this one to modify pictures of getbig members
adobe photoshop - great app, still learning how to use it - i used this to make the infamous candidizzle pic where hes being analed
winamp - music player, simple & fast
skype - lnd calls, great one, i love it when im travelling around the world! - also great to stalk people
drivecrypt - got some info such as paedophile pictures? roid suppliers? business data? this program is great, most of my valuable info is protected with this and believe me, not even the nsa can break this due the algorythm and the way it works, auuuuuuuu and could you imagine i spent 3 years of my life hanging around with the guys from the distributed.net project?
there are many more but i guess those are pretty good enough for everybody here, post up your favorites!