There is a wide variety of image editing and publishing tools available. Included here are many excellent free and low cost options.
Image Software

GIMP
GIMP (GNU Image Manipulation Program) is a free, cross-platform image editor available for Linux, OS X, Windows, and more. GIMP can be used by graphic designers, photographers, illustrators, and scientists. It provides sophisticated tools and can further enhances with many customization options and 3rd party plugins. learn more

GIMP vs Photoshop
This video takes a quick look at the pros and cons of both Photoshop and GIMP. And good news! GIMP version 2.8, mentioned in the video, is now available. learn more

Paint.NET
Paint.NET is a free(!) image and photo editing program for Windows PCs. While not as "feature rich" as PhotoShop, it does a great job and loads faster than many of the other programs. An active and growing online community provides a wide variety of "plugins" to address specific editing needs. You'll find friendly help, and… learn more

PaintShop Pro
A good alternative to Photoshop is Corel's PaintShop Pro. While not the gold standard, it provides many of the same features and can be easier for schools to purchase (one-time fee vs. a monthly subscription). Our webmaster has used PaintShop Pro for many years with great results. learn more

PIXLR
Pixlr, among other things, has simple and advanced photo editors you can use right on your web browser. They also make cell phone apps and desktop versions available for a nominal fee. Worth checking out. learn more

Shape Collage - Automatic Photo Collage Maker
Shape Collage is the only collage maker that: optimally arranges photos creates collages in different shapes can handle thousands of photos generates super high-resolution images (up to 200 megapixels) makes collages in just seconds exports to Photoshop PSD file format learn more

The Adobe Options
Adobe Photoshop has been the gold standard for photo editing and manipulation, with a price to match. This link looks at the various Photoshop and Photoshop Elements offerings based on the tasks you need to perform. Adobe is now providing their products as an on-line subscription (Creative Cloud). You pay a small amount per month,… learn more