SubEthaEdit
Collaborative coding for programmers has powerful editing tools, command line access and ability to create scripts. Now free and open source.
Older free apps
Boostnote
Note-taking app for programmers features markdown and syntax highlighting for dozens of languages. Choose your own themes and hotkeys. Syncs with Dropbox.
MacDropAny
Sync any folder on your Mac with a cloud service — including Dropbox, iCloud Drive, Copy, MediaFire, Hightail, hubiC, Google Drive, Box, OneDrive, Mega and Creative Cloud. Just two steps.
Growly Calculator
A spreadsheet that specializes in crunching numbers. There are plenty of functions, similar to the ones in Excel, but not nearly as many. Supports DIF, CSV and RTF.
Growly Write
A simple — but not too simple — app for people who want a word processor with the features they actually use. Everything is easy to find in a format panel that includes a multitude of features.
SmartBackup
Sync folders and volumes, or create a bootable clone of your Mac startup disk.
darktable
This open source alternative to Adobe’s Lightroom manages your digital negatives in a database, lets you view them through a zoomable light table and enables you to develop raw images and enhance them.
IINA
Open source video player built from the ground up for modern versions of macOS. Supports common media types and outputs high-quality video optimized for retina screens.
Maelstrom
Classic arcade game where you navigate through space, zapping asteroids before they destroy your ship.
Noto
General-purpose text editor supports extensive encoding, multi-selection indentation, invisible characters and iCloud Drive integration.