Look at that SaaS - Inspiration and resources for SaaS founders
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Micro-SaaS - All you need to build your own SaaS at one place.
Sketch - Professional digital design for Mac.
SaaS Weekly - Weekly Newsletter for SaaS via Hiten Shah
Affinity Designer - Professional creative software, exclusively for Mac.