If you're willing to compile it, Aseprite is a great option as well.
check my website for the latest tips - always updating with new content!
Check out this free pack by Miljan Bojovic with 50 grey scale noise maps in a resolution of 512×512. The alpha maps are all 32 Bit PNG format.
The pack also includes 10 extra alphas.
- 3D Coat
- Substance Painter
- 3ds Max
- Cinema 4D
- All softwares that supports PNG import format.
You can find higher resolution for $4.99 here.