PricewaterhouseCoopers (PwC) - Find out more about PwC (PricewaterhouseCoopers) LLP including an overview, stats, history and other Accounting competitors.
On-Screen Ruler - lightweight, free, semi-transparent ruler
Synechron - Synechron, one of the fastest-growing digital, business consulting & technology services providers firm based in New York.
Bluegrams Screen Ruler - A lightweight and configurable ruler tool for Windows Desktop.
Sirius - An open-source clone of Siri from UMICH
Pixus - Pixus is an AIR pixel ruler application, a handy tool for web and interface designers.