- Chrome ($Free) - Because Safari sucks
- VLC Media Player ($Free) - Because QuickTime blows
- Acorn ($30) - Photoshop for humans
- Airmail ($10) - An excellent email client, supports Gmail, Yahoo, Hotmail, Exchange, etc.
- Twitter ($Free) - Twitter's official Mac client. It's pretty great.
- TotalFinder ($18) - Makes Finder not suck
- XtraFinder ($Free) - Free alternative to TotalFinder
- HyperDock ($10) - Lets you customize everything about the Dock
- BetterTouchTool ($Free) - Makes the Magic Mouse 1000% better, and also lets you tweak pretty much every part of the OSX interface
- Stay ($15) - Window manager
- cd to ($Free) - Finder add-in to open the current folder in Terminal
- CheatSheet ($Free) - A keyboard shortcut to help you learn the keyboard shortcuts for any Mac app (so meta!)
- Caffeine ($Free) - Keeps your mac from going to sleep
- Disk Inventory X ($Free) - Find out why you're out of disk space
- Lingon ($10) - Manage autorun apps and daemons
QuickLook is the popup preview window that you get when you press the spacebar on any file/folder in Finder. It only supports a few file types by default, but you can add plugins to support other types:
- QLMarkdown - ($Free) - Previews Markdown files as rendered HTML
- QuickLookJSON ($Free) - Previews JSON files, with syntax highlighting
- QLStephen ($Free) - Previews any text-based file (great for source code!). Also works for dotfiles and files without a file extension
- SourceTree ($Free) - A fantastic GIT GUI. It's ridiculous that this thing is free
- Coda ($99) - An excellent IDE for web development
- CodeKit ($32) - An automation tool for web development, works with any IDE
- MacDown ($Free) - A WYSIWYG markdown editor
- Dash ($20) - Offline documentation for pretty much any language, platform, or API you can think of
- Gapplin ($Free) - SVG viewer
- Transmit ($34) - File transfer app (FTP, SFTP, S3, WebDAV, etc)
- Shuttle ($Free) - An SSH shortcut menu
- Postman ($Free) - Super-handy tool for to building & testing REST APIs