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.
Bugsee - See video, network & logs leading up to bugs or crashes
Diun - Docker image update notifier
Buglife - Seriously awesome bug reporting for iOS apps
DocRaptor - As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more
Hottext.net - It is a simple tool to post text online, without rumpus.