I use a lot of free software, and its all quite nice.
Its true, there are some programs that dont have that great of free alternatives, but, in most cases, I have found alternatives that are equal or better.
An example:
KLite Codecs Pack, better than what nVidia or any other codec company has
NVU/Kompozer, much easier to use than DreamWeaver, not to mention, a heck of a lot smaller. For what I need it to do, its perfect, Dreamweaver is too much
MyMobiler, which remotely controls my phone, great software, no lag or any of that whatnot. Many companies out there have similar programs they want you to pay for
Avast Antivirus, faster than McAfee or Symatec/Norton, better detection in some cases as well, and boot time scan? THATS A feature ANY scanner should have.
TrueCrypt, encryption software, free, fast, extremely secure. Absolutely no back doors, as you often find with a few of the larger companies. Not to mention, constantly updated in the event that there is a security flaw.
Thats just a few.