Inkscape is a free and open-source vector graphics editor software.

Synfig Studio (Synfig) is a free and open source 2D vector graphics and timeline-based animation software.

Karbon is a vector graphics editor.

Pencil is an open-source GUI prototyping tool that's available for ALL platforms. Pencil is built for the purpose of providing a free and open-source GUI prot…

Gravit Designer is a cross-platform, free design tool.

Boxy SVG is a vector graphics editor.