Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
SaaS 1000 - Free exportable list of the fastest growing SaaS companies
Invision - Prototyping and collaboration for design teams
Look at that SaaS - Inspiration and resources for SaaS founders
Sketch - Professional digital design for Mac.
Inside SaaS Sales - 1000+ sales emails and voicemails from top SaaS companies