SVG Animation Assistant - Quickly and easily animate Inkscape SVGs.
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Vectr - Free vector graphics editor. A simple yet powerful web and desktop cross-platform tool for everyone.
Sketch - Professional digital design for Mac.
Hype - Using Hype, you can create beautiful HTML5 web content.
Adobe Illustrator - Adobe Illustrator is a vector graphics editor.