Inkscape is vector graphics software for creating icons, illustrations, logos, diagrams, maps and web graphics. It's cross-platform, extremely feature-rich yet simple to use, and extendable. Users therefore include design professionals as well as hobbyists. It's engineered around the open and standard SVG (Scalable Vector Graphics) format. Its sophisticated drawing tools easily match up to Adobe Illustrator, CorelDRAW and Xara Xtreme. Inkscape also can import and export to AI, Encapsulated/Posts
Ksnip is a Qt-based cross-platform screenshot tool that provides many annotation features for your screenshots.
Simple to use paint program like Paintbrush for Mac or classic MS Paint, but for Linux.
Calligra is an integrated suite of applications that cover office, creative, and management needs. It offers applications on both desktop computers and mobile platforms like tablets and smartphones. OpenDocument Format (ODF) is used, making it compatible with OpenOffice.org, LibreOffice, and Microsoft Office. Calligra Suite contains the following applications: Calligra Words (word processor), Sheets (spreadsheets), Stage (presentations), Flow (diagrams and flowcharts), Kexi (visual database crea
Pinta is a graphics drawing/editing program modeled after Paint.NET. It strives to be simple yet feature-rich, and runs cross-platform. Drawing tools include freehand, lines, rectangles, ellipses, and more. It allows unlimited layering, undo and redo history, over 35 image effects, and supports floating or MDI workspace layout.