Inkpad - Inkpad - Vector illustration app for the iPad.
SVGO - Tool for optimizing SVG files
Adobe Illustrator - Adobe Illustrator is a vector graphics editor.
SVG Cleaner - Generally, SVG files produced by vector editors contain a lot of unused elements and attributes...
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Vector Artist - Vector art software designed for tablets.