Votum for Slack - Crowdsourced lists with upvotes, inside Slack

Pudding.ai - Real-time ad creative analysis solution that helps marketers to easily understand ad creative performance with actionable insights.

Must-Read for Slack - Build controllable must-read lists for your team in Slack.

AdWhistle - AdWhistle is a web-based platform that provides you the features and tools to create a campaign strategy and run the ads successfully on various social media platforms.

Corpus - Curate, take notes and share your reading list

Facebook Ad Library - Find out who is paying for ads with Facebooks new tool