Active Pixels is described as 'has a lot of the same menus and keyboard shortcuts that Photoshop has.It is an excellent photo editor that can be very useful for those cases in which you dont have Photoshop at hand or you just prefer to use a lighter app to perform the same tasks' and is a Image Editor in the Photos & Graphics category. There are more than 10 alternatives to Active Pixels for a variety of platforms, including Windows, Mac, Online / Web-based, PortableApps.com and Linux. The best alternative is GIMP, which is both free and Open Source. Other great apps like Active Pixels are Krita (Free, Open Source), Adobe Photoshop (Paid), Paint.NET (Free Personal) and Photoscape (Freemium).
Thumba is an online service for editing images, full of great features. You can make simple adjustments to your pictures or even apply great effects. All this in a practical way and directly from your browser.
Fhotoroom HDR is an easy to use powerful image editor that can take your JPEG's, Digital Camera RAW and High Dynamic Range photos and help you fix exposure, color, and distortion problems or quickly and easily make your photos stunning.