1. Detect and diagnose crashes in your applications. Bugsnag's cross platform error monitoring helps you ship with confidence.

    freemium

  2. 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.

  3. The top apps in the world rely on Instabug for beta testing, user engagement and crash reporting.

  4. Open Web Analytics - Web Analytics – Open Source Web Analytics Framework

  5. Frustration-free log management. Get started in seconds.

  6. Site24x7 offers both free & paid website monitoring services. Monitor websites remotely and receive instant email/sms alerts if your website becomes unavailable. View uptime & performance graphs of your website monitors.

  7. log4net is a tool to help the programmer output log statements to a variety of output targets.

  8. AppEnlight provides performance, exception, and uptime monitoring for the web.

  9. Monitis specializes in IT monitoring, covering server, website, app monitoring and more within an all-in-one monitoring platform.

  10. The most powerful, yet lightest weight crash reporting solution for iOS and Android developers. | Crashlytics

  11. The open source error catcher that's Airbrake API compliant

  12. Stackify is the only developers-friendly solution that integrates error and log management with application performance monitoring. Code more support less. Start your free trial now