Axcept
axcept.ioCloud-based screenshot and UI testing platform with visual test editor.
Independent rating agency for API providers (historical, from 2014).
Everything you need to know about API Ratings
API Ratings (API Rating Agency) was an independent effort to rate API providers on metrics like terms of service, uptime, and overall reliability—similar to a Moody's for APIs. It was a work-in-progress in 2014 and appears to be historical/discontinued based on available documentation.
Evaluating API providers for reliability and trustworthiness (historical).
Free (historical).
Developers choosing API providers (historical).
What real users think about API Ratings