Only the current version so far — new entries appear as the app ships updates.
Wizzbe is an education app by LogoSapience with 1,000+ downloads (about 4.5K estimated). +5 installs in the last 7 days. Released Jun 5, 2012. Install growth, rank history, SDKs and ad networks.
From the store listing: “Student of the institution Wizzbe digital library space.”