iOSSearch: Find Apps for your Older iPhone or iPod TouchFor alternatives to the official Facebook app, try searching above for Facebook Chat.
Search Apple's iTunes store for compatible apps. This works best on a desktop computer. Some formerly compatible apps may be listed.
Finding iOS Apps Compatible with Older Devices. Apple Club
The Sept 8 post discusses what happened to Vintapps. Facebook
App-finding technique by msgarmar. Apple Support CommunitiesJuegos y apps para iphone 3G con iOS 4.2.1. Taringa
People using Whited00r custom firmware should select iPod Touch (1st gen) above.
Although the international menu is no longer necessary, it may be useful to some people. An older version is available here.