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.
Buglife - Seriously awesome bug reporting for iOS apps
Uilicious Snippet - Free testing platform to replicate & share website bugs 🐞
Linear - Streamlined issue tracking for software teams
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
Sifter - Sifter is designed to be a simple bug and issue tracker for small teams and works especially great for teams with non-technical folks involved.