Just thought I'd point your attention to this:
I want a Freeware Utility to ... 450+ common problems solved : eConsultant
Not sure if it's been posted before but it's a brilliant compilation for freeware that has a free alternative to most software.
There is also an open source list here:
Open Source Freeware : 400+ free applications and utilities : eConsultant
But if I'm being honest, that one isn't that good.