Library Management or Collecting Software

[KnightOfTruth]

So I couldn't find a thread about this, though I swore there used to be one... does anyone here use any particular software/app/program to keep track of their collection or game libraries?

I had been using a google spreadsheet for awhile, but its tedious and painful (though obviously you get the portability with it). I saw a few other programs out there such as the one offered by collectorz.com, and a couple of other iOS apps.

What do you all use (if any) for this type of thing, and what are your experiences with them?

(P.s. feel free to merge this with the other thread if it exists)

Edit: Wow, 1800 posts!