Zen Flowchart - The simplest tool to create flowcharts
Startup Stash - A curated directory of 400 resources & tools for startups
Octopus.do - Build your website structure in real-time and rapidly share it to collaborate with your team or clients. Start prototyping websites or apps instantly.
Makerbook - A directory of the best free resources for creatives
Platforma Flowcharts - Collection of cards for website and app prototyping
Freebiesjedi - Discover & download useful freebies everyday