Startup School - How to start a startup, by Y Combinator
Startup Rocket By Buildily - The best startup tool kit for founders in one membership
Owlead - Grow your Twitter with valuable followers, effortless
Startup Toolkit - Interactive how-to guides to launch your startup
Hyper Founder Program - An 8-week founder program inspired by Product Hunt
JumpStart Toolkit - A pack of tools and goodies to jumpstart your startup