On-Screen Ruler - lightweight, free, semi-transparent ruler
Nova Code Editor - Nova Code Editor is software that is used for writing and editing codes.
Meazure - What are the dimensions of that image? How big is this window?
Quip Inbox - A smart and useful new inbox for living documents
Bluegrams Screen Ruler - A lightweight and configurable ruler tool for Windows Desktop.
Perfect Wiki - Build and organize your knowledge base of company resources without switching between workspaces