What are some alternatives?
AquaSnap - Too many windows on your screen? Stop wasting your productivity.
ImageOptim - Faster web pages and apps.
Shiftit - fikovnik has 62 repositories available. Follow their code on GitHub.
TotalFinder - TotalFinder is a plugin for Finder.app which adds tabs like in Chrome browser, dual panels similar to TotalCommander and more tweaks.
Spectacle - eczarny has 16 repositories available. Follow their code on GitHub.
Path Finder - The Finder, reinvented. Path Finder is an award-winning file browser and management application for Mac OS X.