DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
TiddlyWiki - a non-linear personal web notebook
Plivo - Plivo simplifies your customer engagement.