Does anyone know of some apps that are still compatible with iOS 4.2.1 and the 2nd generation iPod touch. I recently had to wipe mine and restart from a old backup. All I have on it now is Opera and Pandora (the only 2 apps that were on it at the backup time. Now that iOS 6 is out it seems that every app is for iOS 4.3 or 5+. Any help would be appreciated.
You can't do much other than, as the others stated,
- install a well-known pirate JB tweak (allowing for installing IPA's from any source, with any signature) and Google for IPA's. Probably this is the best way for you NOW as you haven't backed up your old IPA's, that is, you can't go the "let's restore an old IPA from my local archive" way (third bullet below).
- use apps discovering apps in the AppStore still compatible with your handset. This won't help much in finding a specific app - only generic ones. You may have luck in running into an app that at least partly resembles the app you're looking for.
- maintain your own IPA archive.
Apple is pretty greedy and, in Sep/2012, have rendered even models that were actively in Apple Stores up to late Sep/2010 completely incompatible with new apps.
This (greed and the accompanying let's-screw-up-customers approach) is one of the worst things I really despise in Apple. Google is allowing for devs upload apps compatible even with the earliest (2008) Android versions. Apple could easily do the same but no - they want you to upgrade your hardware.