XRebel - XRebel is a lightweight Java profiler that helps developers find and fix common problems in their application as they code.
Loader.io - Loader.io is a simple cloud-based load testing service
manik-hot-deploy - Manik Hot-Depoy is an eclipse plugin for hot deploy of web applications
LoadFocus - Cloud Testing Infrastructure | Cloud Testing Services and Tools for Websites & APIs.
HotSwap - Download HotSwap! - Removes devices from Device Manager without putting the data stored on the connected drives in danger, also providing a console-based mode
Loadium - Performance Testing & Load Testing Tool