Google Open Source - All of Googles open source projects under a single umbrella
The Influencer Marketing Stack - Free resources to launch a killer campaign
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
Content Marketing Stack - A curated directory of content marketing resources
Open Source @IFTTT - A collection of IFTTT OSS projects.
Mention ✪ Influencers Dashboard - Identify the influencers talking about your company