App Launch Checklist - Planning tool for launching your app successfully
DevDojo - Dev tools and resources for building awesome stuff
Cruip - Landing page templates for startups
UXsniff - Track user behavior on your website and improve conversions with UXsniff: the user experience watchdog that looks out for you.
Startup Stash - A curated directory of 400 resources & tools for startups
UX Recipe - Checklist to discover your next UX project tools/techniques