Software
The following are products and applications I've found extremely useful.
iOS Apps
1password - The best password management software I've ever used, with iOS to Mac syncing
Linux Applications
Firehol - Simply for your firewall rule creation
Mac Apps
1password - The best password management software I've ever used
Adium - Instant messaging client
AirFlick - Send other video formats to Airplay capable devices
AppShelf - Manage your license information
Boxee - Cross platform XBMC package
Camino - A rebuild of Firefox with design catered to match OS X
Chill Pill - Turn your Fever RSS reader into a desktop Application
Cocoalicious - Manage your del.icio.us bookmarks
Coda - Versatile code editor
Corona SDK - Create apps and games for iOS and Android devices
DaisyDisk - View your disk allocation visually and beautifully
Day One - Simple menubar day journal
Delibar - Maintain your del.icio.us bookmarks
Delicious Library - Keep track of your possessions and track their location and value
Disco - Mac burning software
Dropbox - cloud based file storage with great integration
Espresso - Code editor with a clean and simple design
Fluid - Turn web applications into desktop applications
Flux - Web design tool with excellent CSS previews
f.lux - Modify your computers screen tones to agree more with the time of day
GameSalad - quickly and easily create games for the Mac
Google Chrome - sandboxed Webkit browser
Google Notifier - Menubar mail notifications, just be sure to force SSL
Hyperspaces - Allows you to modify and better control OS X's Spaces
InsomniaX - Force your computer to stay awake (so you don't have to)
iStat Menus - Menubar resource utilization graphs
iTerm - A better terminal
Keka - Multi format decompression tool
Linkinus - IRC client
LittleSnapper - Quick and easy screen capturing tool
MacJournal - Easy to use journal with syncing support
MacUpdate - Check all your applications for updates
Nessus - The network vulnerability assessment tool has a nice Mac version too
NetNewsWire - RSS feed reader with syncing support
NFOViewer - ASCII art viewer
NoMachine - Amazing and free remote desktop for UNIX
Opera - The original other browser
Parallels Desktop - The best virtualization software for Mac
Pixelmator - Photoshops strongest competitor for the Mac
Plex - XBMC client, but unlike Boxee is Mac only
Process - Keep your tasks and projects organized
Quicksilver - Use keyboard shortcuts to automate and expedite common tasks
Quinn - Mac Tetrinet client
RapidWeaver - Quick and easy web site tool for newbies with decent designs
Seas0nPass - Mod your AppleTV
Senuti - Sync songs between your iPod
Sequel Pro - Beautifully designed MySQL database editor
ShoveBox - Store all your random odds and ends
SketchBook Pro - The best sketchbook software out there
Skype - Video and teleconferencing for cheap/free
Smultron - Simple but strong text/code editor
Things - Keep track of your tasks and todo lists
Together - Digital organizer, store everything in it, supports syncing
Transmission - BitTorrent client
Transmit - Excellent FTP/SFTP client
Twitter - The best Twitter client is now the official one
Unison - Newsgroup reader
Versions - Subversion client
VirusBarrier - The best Mac only AntiVirus software
VLC - play any type of video format
WaterRoof - take control of Mac's FreeBSD firewall options
WireTap Studio - The best podcast software
WriteRoom - Hide the distractions and use this clean interface to write
YummyFTP - Excellent FTP/SFTP client
Zwoptex - Spritesheet editor
Windows Programs
Imgburn - Freeware CD/DVD burning and imaging software
