Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Lean Canvas - Business plans take too long to write, are seldom updated, and almost never read by others but documenting your hypotheses is key. Lean Canvas solves this problem using a 1-page business model.
Invision - Prototyping and collaboration for design teams
HMTMAA - Clever tool to estimate cost of building an app
Sketch - Professional digital design for Mac.
Confirmic Cookie Widget - The only cookie solution designed with great UX in mind