Snap Assist is a toolbar utility application that makes window management easier.

Features:

• Press ^ ctrl + ⌘ cmd + W to make a fullscreen window.
• Press ^ ctrl + ⌘ cmd + S to make a normal size window.
• Press ^ ctrl + ⌘ cmd + A to resize window to half screen and move it to the left.
• Press ^ ctrl + ⌘ cmd + D to resize window to half screen and move it to the right.

Currently, the application supports fullscreen, halves, and conversation to normal size. Use either keyboard shortcuts or drag&drop window to top/left/right of your screen.