iDoneThis - iDoneThis The fun, easy way to get stuff done. Every day we’ll email your team to ask, “What’d you get done today?” Just reply to our email. The next day, everyone gets an email with the team's accomplishments

Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.

Jell - Helping distributed teams thrive through async daily standups - all in minutes a day.

Spectrum - Browser-based app to visualize the frequencies of an audio file.

How to Acquire More Users - The growth guide used by Y Combinator companies

YC Startup Class - A live, one-hour class by Sam Altman on Platzi