Usetiful - Fight user churn with great user onboarding. Interactive product tours and smart tips significantly improve your user retention.
Makerlog - Makerlog is the dead-simple task log that helps you stay productive and ship faster.
News API - Get live headlines from a range of news sources
WIP.co - Work in progress. We are a community of makers who help each other ship product.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.