SizeUp is an OS and utilities app (or website) designed to help maximize the potential of your Mac computer. It provides a wide range of features that allow you to customize the way you use your Mac. The app offers a powerful window manager that allows you to quickly and easily arrange windows on your screen, as well as a range of shortcuts for quickly accessing system preferences, applications, and files. The app also provides a dashboard with a range of information about your computer, such as memory and CPU usage, storage space, and more. Additionally, the app can be used to resize and move windows, create multiple desktop workspaces, and access a range of tools for optimizing your system. SizeUp is designed to make it easy to get the most out of your Mac.
Basically the same product, but open source!