MacDown - MacDown is an open source Markdown editor for OS X, released under the MIT License.
MCS-rm - MCS-rm is a rental management software that manages and controls the efficiency & profitability of hire operation.
Typora - A minimal Markdown reading & writing app.
Proscient - Oil and Gas Vertical
Pine - A lightweight, modern macOS markdown editor written in Swift
ProdEval - At tcwsoftware.