Tuemilio - Email forms and referral waiting lists for indie makers
Promotehour - Free list of 1100+ media outlets to pitch your startup
Startup School - How to start a startup, by Y Combinator
Press Hunt - Press Hunt saves you hundreds of hours by aggregating data on almost 400,000 journalists and reporters in one place, complete with their writing interests and contact info.
Electron Toolkit - Toolkit to build and launch Electron apps
Submit Juice - Free and curated list of startup directories to promote your new startup. We manually post your startup to more than 150+ relevant directories and blogs to help your startup get discovered.