1.Picasa (download at picasa.google.com) is Google’s own photo editing software, that in addition to main features like adjusting light and color balance etc offers also an option to send edited pictures conveniently to your friends. It’s also very easy to use.
2.FotoFlexer (www.fotoflexer.com) is most advanced online photo editor there is. You even don’t have to download it to your computer – all you need is a browser and a photo that needs editing. As they say, FotoFlexer is the most powerful online photo editor in existence. It can remove blemishes, change skin/hair color, morph photos and more!
3.Picnik (www.picnik.com) is another online photo editing tool that lets you tweak your photos with their powerful editing tools. No registration required.
4.Paint.NET (download at www.getpaint.net) is free image and photo editing software for Windows computers. It features an innovative user interface that supports layers, unlimited undo, special effects and wide variety of useful tools.
5.Serif PhotoPlus (download at www.freeserifsoftware.com/software/photoplus) is a free photo editing software. It is free and if you fall in love in it, you may upgrade to PhotoPlus 8 for a small fee. It’s perfect for editing images and enhancing color balance, adjusting brightness and contrast and making many more changes.
6.PhotoFiltre (download at photofiltre.en.softonic.com) is loved by users because it’s easy to use, it will install and launch very quickly. It has all basic features such as contrast/saturation/hue buttons etc. Free for private use.
7.GIMP (download at www.gimp.org) is a free software for photo retouching, image composition etc. It is said that GIMP is the best free alternative for Photoshop there is.
8.Photoscape (download at www.photoscape.org) is “fun and easy photo editing software” that has all the basic features you’d be looking for in a photo editing software.
9.Pixia (download at www.snapfiles.com/get/pixia.html) was originally Japanese software but due to popular demand the developers have made an English version of their nice program. Downloading this program you’ll have all the tools you need for editing your photos and images.
10.Ultimate Paint (download at www.ultimatepaint.com) has also a freeware version of their software. It has flexible brush handling method and it features resizing, rotating, flood filling, text operations and more.