Adtuo - Optimize Google and Facebook Ads collaboratively
Google Open Source - All of Googles open source projects under a single umbrella
ADYOUNEED - Marketing platform to create and optimize ads
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
Adriel - A platform to monitor, control, and optimize your paid advertising from 600+ ad channels under a single dashboard.
Open Source @IFTTT - A collection of IFTTT OSS projects.