1. Some Tethering for Android
Multitasking crashing on iPod Touch 2G or iPhone 3G on 4.2.1?
Open up WinSCP or iFile, and Navigate to /System/Library/CoreServices/Springboard.app and open up either N82AP or N72AP.plist.
Make sure Multitasking is enabled, if you don't see
Then add it.
Find the section that says
Copy that entire section and paste it right below it. Now you should have it written twice. In one of them change the 1 to a 2. Respring and you can now switch apps from the multitasking switcher .
Sources: http://www.facchinibr.net/wp/30/11/2010/how-to-fix-multitask-crash-respring-on-4-2-1-iphone-3g/ and http://www.ifans.com/forums/showthread.php?t=323402
3. Enable Battery Percentage + Extras without jailbreak:
Information at: http://www.ifans.com/forums/showthread.php?
5. Want to transfer music or videos from your iPod to computer? Get Sharepod. I tried it and it works.
Get Sharepod here: http://www.getsharepod.com/