add spectacle

Author: sb2nov

README.md

@@ -810,7 +810,7 @@ Here is a quick list of some apps I use, and that you might find useful as well:
 
 - [Evernote](https://evernote.com/): Notes taking application. I switched to [Simplenote](http://simplenote.com/) because I only take text notes. Simplenote is so much better for text notes (and it supports Markdown!). **(Both are free)**
 
-- [Moom](http://manytricks.com/moom/): Don't waste time resizing and moving your windows. Moom makes this very easy. **($10)**
+- [Moom](http://manytricks.com/moom/) or [Spectacle](http://spectacleapp.com/): Don't waste time resizing and moving your windows. Moom makes this very easy. I recently tried out Spectacle, though it might have some less features then Moom but it provides everything I need. Plus Spectacle is open source. **($10) and Free**
 
 - [Alfred](http://www.alfredapp.com/): Replacement for spotlight.**(Free)**