surge.sh - Static website hosting for front-end developers.
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.
GitLab Pages - GitLab Pages you can create static websites for your GitLab projects, groups, or user accounts.
HMTMAA - Clever tool to estimate cost of building an app
GitHub Pages - A free, static web host for open-source projects on GitHub
Confirmic Cookie Widget - The only cookie solution designed with great UX in mind