Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.

SMMRY - Summarize articles, text, websites, essays and documents for free with SMMRY.

Rollbar - Rollbar collects errors that happen in your application, notifies you, and analyzes them so you can debug and fix them. Ruby, Python, PHP, Node.js, JavaScript, and Flash libraries available.

SummarizeBot - A blockchain-powered bot that summarizes information for you

RootCause - Record, Replay and Reproduce JavaScript Errors

TLDR This - Automatically summarize any article or webpage in a click.