I use
Java 8
LibGdx, Box2dLights
JavaDb, MyBatis
Ant, Gradle
IntelliJ
Git
JProfiler
TexturePacker
Gimp
ProMotion
Tiled
TotalCommander (vital)
Notepad ++
OpenOffice
Reaper
What do you use ?
Ideally this would be some sort of poll on one of those polling websites…
If you’re interested though:
Hardware:
Win 10 Ultimate N
i7/4GHz
8GB RAM
Nvidia 960GT
500GB SSD
2 monitors @ 1080
Software:
Eclipse (using SVN, ANT)
Java 8 (64 bit)
Textpad
Affinity Designer
GIMP
FruityLoops & SimSynth
PostgreSQL
Chrome
FileZilla
Dropbox
Steam 
That’s about all I actually use on a day-to-day basis.
Cas
Hardware
Intel i7 4790k
NVIDIA GTX 750 Ti
RedGear Wireless Pro Gamepad (XBOX Style)
Speedlink Wired USB Gamepad (PS3 Style)
LiveTech Wired USB Gamepad (PS3 Style, cheap one)
Microsoft XBOX 360 Wireless Controller (Original, including wireless receiver for PC)
Logitech WebCam, keyboard and mouse
Built-in Sound Card
An old 1600x900 monitor (Saving now to replace it with a new one)
Software
Windows 10 Home
Java 8 (64 bit)
.Net 4.6
Python 3
Ruby 2
SilenceEngine, Unity3D
VisualStudio
IntelliJ IDEA Ultimate
Eclipse (college forces me to use Eclipse, although I have IDEA)
Atom (my favourite for Web dev and Gradle script editing)
GIMP
Inkscape
Synfig Studio (2D skeletal animation tool)
Blender 3D
@princec
Affinity Designer - never heard of. What’s your impression, can it be a replacement for Gimp ?
Hardware
Msi ge72 2qd apache pro
Software
Windows 10
Java 8
LibGdx and Scene2D
Gradle
AndroidStudio, Eclipse and sometimes SublimeText
TexturePacker
Adobe Photoshop and Flash
Inkscape
Audacity
Filmora
Wamp64
And notes, very notes!! :
Hardware
2.6GHz Intel Core i7
16GB RAM
NVIDIA GeForce Gt 650M 1024MB
Intel HD Graphics 4000 1536MB
2880x1800 laptop display
27-inch 2560x1440 thunderbolt display
500GB SSD
Software
macOS Sierra (though I wish I had the previous OS)
Java 8
GIMP
Pixelmator
TextMate
Eclipse Mars
Safari
Garageband
Discord
Skype
The software I use:
- Eclipse
- Blender
- Substance Painter
- Audacity
- Paint.NET
- Java Visual VM
- Git
Basically everything you need to make VIDYA GAEMZ
You might have said that unintentionally, but VIDYA in Telugu means EDUCATION.
Most of my dev is on a Dell laptop I bought second-hand, 15 months ago. Runs I3, Windows 10.
Java8 (including JavaFX)
Eclipse Neon
libraries:
my own audio library
gustafson’s Perlin Simplex Noise implementation
jcraft’s ogg decoder
external tools:
Audacity
microsoft paint on rare occasions when making an icon
For 2D games – don’t need to get too deep into 3D tools.
The little 3D I do is a simple JavaFX, mostly as a testing site for 3D audio experiments.
Hardware:
A10-7850K at 45W (no fan)
8GB RAM
2 64GB SSD and 4TB on NAS.
Software:
Ubuntu 16.10
Eclipse with Java 8 and vi plugin
Vim
Git
GIMP
Inkly
The last one in bold because you should all try it out. It’s Inkle’s editor for Ink interactive stories.
My PC:
i5 6600, GTX 960, 16GB RAM and about 12TB of storage. 24" 1080p monitor.
My laptop is a MacBook Pro 13" from 2015.
Software:
Triple-boot Windows 8.1, El Capitan and Fedora 25.
NetBeans on Windows. Fedora is just for learning Linux. OS X is for music production.
Most of the tools I use for actually developing my game are built into my engine, but at the moment I use Paint for art since I’m only at a very bare-bones texture stage.
Hardware:
MacBook Air 2014Q4 (1.3Ghz i5, 8GB RAM, Intel Graphics 5000)
Software:
Vim
Tmux
Chrome
Not really make proper games though, more akin to shitty demos, like:
http://ray.jin.fi/
http://flapmmo.jin.fi/
http://tetris.jin.fi/
http://jin.fi/projects/Misc/pocketcraft/
http://jin.fi/projects/Misc/ld29/
http://gof.jin.fi/
http://jin.fi/projects/Misc/pairs-game/
http://jin.fi/projects/Misc/twin/
For the people using VisualVM, a while back i found that it affects program performance and doesn’t measure times as accurately as the -Xprof option, which is described here:
http://www.javaperformancetuning.com/news/qotm037.shtml
But perhaps it has been improved since.
Software:
Netbeans IDE
PAINT.net textures
Inkscape vector drawing
FileZilla FTP
Git via NetBeans
Tomcat WebServer
JTS for useful polygon routines https://github.com/locationtech/jts
Hardware (Laptop):
Win 10
i7 (4th gen)
16GB RAM
Nvidia 860M with 4GB VRAM
1TB SSD
external 24" monitor @ 2560x1440 (using the laptop connected to the monitor only)
Software:
Eclipse Neon
TortoiseSVN
Java 8 (64 bit)
Notepad++
Affinity Designer (actually bought it after I read in one thread about it, I think it was princec who mentioned it)
Paint.NET
Chrome
puTTY
WinSCP
1 overpriced MacBook Pro (Retina, 15-inch, Mid 2015)
1 xbox-controller
1 Nexus5x (for android testing)
1 iPad pro 2 (for iOS testing)
1 radio/spotify/chromecast playing
software:
- IntelliJ
- Gimp
- Audacity
- Trello
- Libgdx as base for my game engine
and for distraction: gmail, twitter,slack and sometimes facebook 
Hardware:
3 24" 1080p screens
FX-8350
RX 280X
HTC Vive
Software:
Eclipse
Unity
Visual Studio
Blender
MS Paint
Steam
SteamVR
@prinec @matt_p : I’m interested to hear how Affinity Designer compares to other design tools
Same here… Lately I hear it everywhere. =D
This famous blog talk about it: http://www.2dgameartguru.com/2016/07/create-clouds-using-circles-in-affinity.html
Hardware:
Intel i7 6700k
NVidia GTX 1080
16 GB RAM
Software:
Java 8
Eclipse
Paint.NET
Misfit Model 3D
Harware:
Intel Core2 Quad Q9650
8GB DDR2@333MHz
GTX 960 4GB
256Gb SSD
Asus Xonar DGX
Software:
Eclipse
Blender
Photoshop CS6
Nothing special whatsoever. HP laptop that I got for coding classes, Eclipse, and Gimp.