I find it hard to believe that these are the only software available on OS X that will keep track of the versions of all the other software on your machine. It seems like such a fundamentally useful utility. Using them requires pro accounts, at Version Tracker that's about $50/year (which seems kind of expensive to me ...maybe if they'd break that down by per month, or per usage it would be OK), MacUpdate is about $40 for the software, which includes the $20 pro account, a little more reasonable, but posted reviews make it sound like it doesn't work as well as VersionTracker Pro.
Is anybody using either of these? Does it work well?
Apple sometimes will alienate developers by incorporating some function into the OS, thus eliminating the need for third party software (Konfabulator comes to mind). This is one space where I wish they would. Seems to me there should be a server implementation of this type of software that will check and inform on multiple client machines as well.
If anyone knows of a utility that will do these simple tasks (find all the applications on your computer, report the version you have, and querry some version site, retrieve version information, and inform you of which software has updates available), please post!