Do you spend many time updating your Mac applications in Snow Leopard? If you want to update your applications manually, try AppFresh software. AppFresh Keep your applications (suach as widgets, preference panes and application plugins installed on your Mac) update and fresh.
How does AppFresh work?
It would checke the excellent osx.iusethis.com for new versions. Then download and install available updates manually.
Once you have download this software, you need to unzip it and copy it into your Mac Application folder.
I tried it and was able to get it working on snow leopard by clearing out the ~/Library/Application Support/AppFresh and reinitializing everything. It Works fine on my Snow Leopard.
Once having available update, AppFresh will label the software with blue arrow and indicate to update them.