LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
The 1-Hour UI Audit - Free course on UI/UX design strategy for SaaS founders
draw.io - Online diagramming application
Omnicourse - Grow your skills with audio courses
yEd - yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.
Knowable.fyi - Audio courses that inspire new abilities