What are some alternatives?
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Ruby - A dynamic, interpreted, open source programming language with a focus on simplicity and productivity
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.
Haskell - An advanced purely-functional programming language