Definition:  

This software allows you to manipulate images: crop, resize, touch-up, apply filters, and convert your photos from one format to another.

Tools: 

• FastStone: a toolset that includes image editor, viewer, and converter (Shareware, PC)
• GIMP: "GNU Image Manipulation Program. It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring" (Free, cross-platform)
• GoogleSketchUp: easy-to-use 3D modeling software (Free, PC/Mac)
• iPhoto: a tool for organizing, editing and sharing photos; part of the iLife package (Commercial, Mac)
• irfanView [Review]: an easy-to-use image editor and viewer; nice conversion features (Free, PC)
• Adobe Photoshop: software for professional photo editing and graphics creation (Commercial, PC/Mac)
• Adobe Photoshop Express [Review]: online image editing and sharing service, with basic tools such as crop, red-eye correction, touch up, etc. (Free storage for up to 2 GB, web-based)
• Picasa: a program from Google; allows you to organize and edit photos, create collages and slideshows, and share photos on the web (Free, PC/Mac)
• Painter: software to create and edit images, engineered especially as a digital studio for the creation of original artwork (Commercial; Windows XP or Vista, Mac)
• Picnik: browser-based tool for editing images; provides "one-click fixes, including auto- fix, exposure, colors, and red-eye. And the others, like rotate, crop, resize, and sharpening" (Web-based, free; via ProfHacker)
• Sumo Paint: a browser-based tool for creating, editing, and sharing images (Free, web-based)
• UVic Image Markup Tool [Review]: facilitates image markup: users can "describe and annotate images, and store the resulting data in TEI XML files...[it] has a simple enough interface that it can be used by people with little or no experience with editing in XML code" (Free, PC)
• XnView: "software to view, organise, convert graphics and photos files or to create slide show, contact sheet, HTML pages" (Free, cross-platform)

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