PGF and TikZ - PGF/TikZ is a tandem of languages for producing vector graphics from a geometric/algebraic...
SVGO - Tool for optimizing SVG files
LaTeXDraw - LaTeXDraw is a graphical drawing editor for LaTeX.
SVG Cleaner - Generally, SVG files produced by vector editors contain a lot of unused elements and attributes...
Diagrams Haskell package - Diagrams is a powerful, flexible, declarative domain-specific language for creating vector...
Vector Artist - Vector art software designed for tablets.