greenpois0n - Greenpois0n performs an untethered jailbreak for iOS 4.
Titanium Backup - Titanium Backup is a very old backup app that has been around since the early days of Android. In fact, it's one of the few apps that covers all versions from 1. Read more about Titanium Backup.
3uTools - 3uTools is a most efficient iOS file and data management tool for Apple users.
oandbackup - Make backups of selected apps on your device and restore from those backups.
Blackra1n - (This is an OUTDATED jailbreaking method.)
SyncDroid - SyncDroid is basically and iOS and Android smartphone manager that lets the users of both smartphones to transfer their mobile content from one smartphone to another within few simple steps.