Can I use Eclipse to work with Unreal engine 4?

I am not interested in using Express nor am I interested in shelling out exorbitant amounts of money for the professional version. Can I use Eclipse or any other free IDE?

Personally I use Sublime Text for most IDE purposes: coding, browsing, searching, kicking off and running builds. The one bit you still need Visual Studio for on PC (or Xcode on Mac) is debugging C++ code.

I use visual studio express 2013, it works just fine, and it’s free.

You do not need express or pro anymore, you can get a fully functional Visual Studio 2013 Community Edition which is identical to professional and it’s free. I would recommend you at-least try it out.

Do you have code completion working for UE4 projects in Sublime Text? If so, please share details about how to setup this thing… I love ST, but can’t make the code completion work…

I just use the built-in auto-complete (based on the current file contents). It is quite basic - I guess I’m just used to it.
I do have a UE4-friendly C++ syntax highlighter, which also vastly improves looking up class and type names (including delegates) in UE4 projects. I’ve attached it in case you find it useful. link text