IntelliJ ultimate, it has support for everything I use, Java, Scala, Dart, Python, PHP, perl, C/C++, Dockerfiles, HTML5, CSS3, JavaScript, Spring, ROO, AspectJ, Hibernate, BPMN, AppEngine, Yaml, Angular, .... and the list goes on.
With full support for Git as well as Github functionality, SVN for when I still need to fall back to old SVN repos and also mercurial for the odd case where I still need to checkout code from Google Code.
Awesome push-in refactoring which other IDEs simply suck at.
Probably the best hints you can get in an IDE suggesting better ways to do stuff, for example, doing something in a Java7 way, but you're compiling for Java8, it'll make suggestions suggesting stuff like you can rewrite this using the following Lambda expression, Ctrl+Space and it refactors your code for you, Alt+Space on a variable and it can generate constructors, getters, setters, etc for you. It'll analyse your code for you ... this variable might not have been initialised, this code is obsolete and will never be reached do to the conditions ... etc.
Probably the best merge tool I've seen so far compared to Netbeans, Eclipse, straight command line and SmartGit (SmartGit probably in a close second place), merging is a pain, with IntelliJ ultimate, you get a screen split into three well marked as your code, resulting code and incoming code with single click moving snippets in and out of the result as well as the option to edit the resulting code in the merge view. Managing multiple branches is also easy.
It also has VIM built in which you can just activate and it's the best VIM plugin I've seen in any IDE.
It's fast, autocomplete is instant unlike Netbeans / Eclipse which has lag when autocompleting on large projects and eclipse sometimes simply crashing. IntelliJ Ultimates actually pops a dialog if you run low on memory asking you if you want to assign more memory to the IDE, every other IDE I've worked with simply crashes into oblivion.
The only CON is probably the expensive price-tag, but if you're writing code 16 hours a day, then not having to fight with your IDE is well worth the money.