What programs/tools do tu use to make your icons?

I usually used Photoshop. Any version of Photoshop tu have, all of them can used to make a beautiful icon.

I always use PicMonkey, but GIMP is a good option as well.

PicMonkey.

Photoshop on desktop o Lomogram on mobile.

I used to use Pixlr but the update made it annoying and it doesn't work half the time anymore, so I switched to a combination of Lunapic and Ribbet.

I use iPiccy (just for cropping my icons) and Autodesk Pixlr (which tu can download for free on the Pixlr website, if tu choose to sign up you'll get más overlays than in the non sign up version)

Adobe Photoshop CS6