Portable GIMP

Portable GIMP is the portable version of the powerful photo editing tool called GIMP, providing the same advanced image retouching utilities.
Since it's portable, you don't even need to install the application, it's enough to copy all the files on a Flash drive and take it with you wherever you go.
The interface features a professional appearance, with a well-organized toolbox that offers you instant access to many of its features.
Beside the basic image editing tools such as crop, scale, blend, paths, pencil, select, eraser and healing, Portable GIMP also supports working with layers, with a wide array of features supposed to help you in this regard.
For instance, you can transform layers, change transparency, adjust boundary size, crop to selection, merge layers, delete, duplicate or create a new one.
The number of built-in filters is absolutely impressive and includes blur, sharpen, distorts, light and shadow, noise, edge-detect, artistic, decor, render, animation, web and many others.
Portable GIMP comes with shortcut support, so you can configure some keyboard combinations to perform certain actions such as photo scaling, selections, saving and many others.
Just as expected, you don't need a super computer to run Portable GIMP, although it may slow down the system when applying certain effects. Plus, it is recommended to use a high-speed USB device for the portable version in order to get the smoothest possible experience.
All in all, Portable GIMP is definitely one of the best image editing tools that can be used on the go, that's for sure.