Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.

AdRoll - AdRoll is a leader in retargeting display advertising. Draw the right people with the right strategies.

Shutter - Shutter is a feature-rich screenshot program.

Marin Software - Optimize your Search, Social & Display ads across channels and devices. Marin Software, the leading cross-channel performance advertising platform.

MWSnap - MWSnap is basically a free to use Windows snapping tools that are used for snapping any part of the screen that is currently displaying on the front of all opened programs and windows.

Google Marketing Platform - Google's unified and improved marketing and analytics tools.