Need to check an installer repo without adding it to your sources and refreshing (for a LONG time)? Then go to iAppCat! There you can search for a repo or enter its URL if you know it and check what programs are available!
Another sweet feature is you can create your own customer source by selecting your favorite programs through your favorite repositories on the site. You can find out what your repo address is by clicking 'list' in the top menu. I am currently building my own customer repo with my favorite apps and will continue to add apps that I like onto it, so if you would like to add it please go ahead! The URL is: http://iappcat.com/r/8425