Barrel is an OS and utilities app (or website) that helps you get the most out of your Mac or PC. It has a range of customisable options and tools to help you boost your system's performance. It speeds up your computer, optimises your RAM usage, helps you free up disk space, and makes your computer run smoother. It also includes a range of tools to help you manage your files, including a duplicate file finder, a file name changer, and a file shredder. It also has a range of system-level tweaks that can help you customise your operating system. With Barrel, you'll be able to get the most out of your Mac or PC.
Cylinder
Springtomize
IOSLife
Discontinued It seems that the application is no longer updated. The latest version, 2.5, released in October 2012, can still be purchased from Cydia.