Hike With Me - Meet like-minded people. Everywhere. Anytime.
MacDown - MacDown is an open source Markdown editor for OS X, released under the MIT License.
Tribyo - Discover, connect and interact with people with similar interests.
Frost - An open API for Blockchain timestamping
Affinity.me - Discover like-minded people (using machine learning)
Typora - A minimal Markdown reading & writing app.