Always wonder what other people are running around here.
Computer:
Main: MSI 760GM MicroATX
CPU: AMD FX-4130 Black 3.8GHZ Quad Core
Cooling: Cooler Master Hyper 212 EVO
RAM: Corsair Vengeance 1600MHZ 8GB
GPU: GeForce 210 1GB
HDD: 2 failing Seagate 1TB drives.. Soon to replace with 1TB WD Black. (That five year warranty sounds nice.)
Monitor: Dell 1440x900
OS: Windows 7 Ultimate
Net: 50MB Cable (That just became available last year.. I live in the sticks.)
Utilities:
CPUID HWMonitor (fan speeds, temps, etc.)
Microsoft Network Monitor (Trace data packets.)
Avast Antivirus
TinyWall (Firewall Management)
Spybot S&D (Malware detection/Immunizations.)
Hijack This (Program info/Malware detection.)
Puran Defrag (Better than Windows Disk Defragmenter.)
Dropbox (Data backup. Not much space, but convenient. Good for syncing project/code folders with a symbolic link.)
Winrar (Not free.) (General file compression/Encryption.)
7Zip (Zip format compression is a little more efficient.)
Daemon Tools (Not free) (Image mounting, writing, editing, etc.)
Media:
VLC Media Player (Video Player)
Winamp (Music Player)
Firefox (Web Browsing.)
Thunderbird (Mail)
Foxit PDF (Lightweight PDF reader)
Sumatra Reader (Reads everything else. CHM, djvu, etc)
Development:
Blender (3D modelling)
GIMP (Free Photoshop)
GraphicsGale Free Edition (Low feature pixel art editor.)
Visual Studio 2015 Community (C/C++)
Netbeans (Java)
IDLE (Python 2.5 and 3.5.)
Notepad++ (Great text editor.)
Minecraft (Not free) (Seriously. Heh. Good for level and terrain design ideas with Carpenter's Blocks. Also a fun way to do Lua scripting with ComputerCraft. All while goofing off.)
Music:
FL Studio (Not free) (Also quite a few plugins for it both free and not.)
Tux Guitar (Useful for quickly converting midi to sheet music.)
Sonic Visualizer (Audio Analysis.)
Virtual Audio Cable (Shareware) (Stream audio between different applications.)
AP Tuner (Tuning instruments through mic.)