Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Slack News Feed - Get the top posts from every Slack chat you're in.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Lurchr - Saves all your Slack links, so you can focus on work
Plivo - Plivo simplifies your customer engagement.
Slack It - A bookmarklet to share links in Slack with one click