Balsamiq - Balsamiq. Rapid, effective and fun wireframing software.
GumGum - GumGum is an in-image advertising platform for publishers, marketers, agencies and brands.
Invision - Prototyping and collaboration for design teams
Creatopy - Creatopy is an ad design platform that helps businesses customize, automate and scale up their ad production and delivery.
Zeplin - Collaboration app for UI designers & frontend developers
Yieldbot - Yieldbot captures and organizes web publisher intents and makes them available for advertisers to match offers and ads with the content.