What are some alternatives?
When comparing Microsoft Visual Studio and JRebel, you can also consider the following products
Xcode - Xcode 4 is the new version of Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.
XRebel - XRebel is a lightweight Java profiler that helps developers find and fix common problems in their application as they code.
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.
Eclipse - Eclipse is an open source community, whose projects are focused on building an open development platform comprised of extensible frameworks, tools and runtimes for building, deploying and managing software across the lifecycle.
TeamCity - TeamCity is an ultimate Continuous Integration tool for professionals