Mac app that shows all open files, directories, sockets, pipes and devices in use by all running processes. Nice GUI for lsof.

A window management application (replacement for Divvy/SizeUp/ShiftIt)

Itsycal is a tiny calendar for your Mac's menu bar. http://www.mowglii.com/itsycal

Create native macOS applications from command line scripts.

General purpose plain text editor for macOS. Widely known for its live collaboration feature.

Adds "modifier key + mouse drag" move and resize to OSX

Source code for the original TaskPaper for iOS.

Little Fingers lets you lockdown keyboard and trackpad input with a globally accessible keyboard shortcut