Whereby (formerly appear.in) - Collaborate from anywhere - video meetings with no downloads
NotePlan - Make plans inside an individual markdown note for every day in your calendar. Use it as a journal for your daily tasks and plan todos in advance. For Mac, iPhone and iPad.
Around.co - Around.co is an app that provides video calls to remote teams all around the world.
markdown to web - Convert markdown to online web page
Remote Meeting - Remote Meeting with Video, Voice, Chat and Screen Sharing
Mochi - Write notes and flashcards with Markdown and study them with spaced repetition.