MacDown - MacDown is an open source Markdown editor for OS X, released under the MIT License.
Tripcatcher - Tripcatcher is a mileage app to keep track of travel expenses.
Frost - An open API for Blockchain timestamping
Traxo - Traxo is a online travel tool that helps users automatically create and keep travel itinerary up-to-date.
Typora - A minimal Markdown reading & writing app.
Concur - Automated travel and expense management - your employees, travel managers and finance, too.