Prospect Stack - 100 ways to generate more prospects
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Bumpsale - Sell your awesome digital product using incremental pricing
LaTeXDraw - LaTeXDraw is a graphical drawing editor for LaTeX.
Sales Samurai - The largest database of B2B sales resources on the planet.
Ipe - Ipe is a drawing editor for creating figures in PDF or (encapsulated) Postscript format.