Utilities:

• FTP: Cyberduck, Transmit, FileZilla.
• SQL management: Navicat, pgAdmin, Sequel Pro.
• System Emulation: VMWare.
• Office: LibreOffice.
• Quicklaunchers: Quicksilver.
• Compression: UnRarX, 7zX.

Network:

• Monitoring: Little Snitch, Nagios.
• Network testing: wireshark, Backtrack, kali.
• BT: transmission.
• IRC: X-Chat Azure.

Firmware:

• Routers: Tomato (USB builds), DD-WRT, OpenWRT, pfSense.
• NAS: FreeNAS.

Text:

• Other editors: smultron, sublime.
• Git utilities: GitX, SourceTree.
• LaTeX: MacTex, scribo.

Video:

• Players: VideoLAN, MPlayer.
• Format conversion: ffmpeg.
• HTPC: XBMC.