14 Upvotes
AUX by Facebook A social music listening app from Facebook
Bump by Facebook Start fun, anonymous chats with people in your community
Reviewhunt Gamify user onboarding experience
Gmail Sender Icons Know the sender's company by adding favicons to Gmail
Polymail A simple, beautiful, and powerful email client for Mac
WiseStamp Powerful dynamic email signatures
Norbert Find Anyone's Email Address
Mailtrack.io The best email tracking solution I've found. Free
Streak CRM in your inbox - for Gmail
SaaS Web-based robots Connecting SaaS apps: Automation made easy