Corona is a Cydia package from the Chronic Dev Team on Saurik's repo. It uses pod2g's Racoon String Format Overflow Exploit and an HFS Heap Overflow to untether iOS 5.0.1 on previously-jailbroken devices. Alternatively, users can also re-run the iPhone Dev Team's redsn0w 0.9.10 to untether their jailbreak with the same exploit. The name is an anagram of the aforementioned racoon software.
AppTapp was one of the first jailbreak tools for the iPhone. It works by downloading the firmware file for the version selected, extracting the restore ramdisk and kernelcache, patching them, and uploading them and a new fstab as a payload to the iPhone.
Absinthe is the A5 userland jailbreak tool for iPhone 4S and iPad 2 on iOS 5.0 (iPhone 4S only), 5.0.1 (9A405) and iOS 5.0.1 build 9A406 on iPhone 4S. This tool was released on 20 January 2012, and is available in three incarnations:
There was also version 2.0 - 2.0.4 that supported all devices on iOS 5.1.1 . This preinstalled Rocky Racoon from Cydia to untether.
The name Absinthe was chosen as an homage to greenpois0n, Chronic Dev Team's earlier jailbreak software. Absinthe is an alcoholic beverage that is often greenish in color and is poisonous in quantity.