1. GTmetrix is a free tool that analyzes your page's speed performance. Using PageSpeed and YSlow, GTmetrix generates scores for your pages and offers actionable recommendations on how to fix them.

  2. Apache JMeter™.

  3. UbikLoadPack provides plugins for Apache JMeter to load test Video Streaming, GWT Applications, Java Serialization based products and Flex.

  4. Load test websites, web apps, APIs, and mobile apps via the cloud. Use scripts to simulate user behavior for up to a million virtual users. Try it for free!

  5. NeoLoad is a load and stress testing tool to measure the performance of web and mobile applications.

  6. Load testing and tracking application

  7. Simplifying cloud hosting. Deploy an SSD cloud server in 55 seconds.

    paid $5.0 / Monthly (1 GB / 1 vCPU / 25 GB)

  8. zGrepCode.com is your helper to browse open source code online.

  9. A rapid application development kit for creating new online applications. Dramatically reduce development times from months to weeks.

  10. Atmel Studio is the integrated development platform (IDP) for developing and debugging Atmel.

  11. Online playground for React

  12. Write cross-platform native apps in Ruby