I just installed gfortran on my Mac OS X 10.8.5, and now I need an IDE in order to write and compile and run my fortran programs. I used to use Codeblocks in Ubuntu, but I prefer to ask for an optimal IDE for Mac OS X.
Development – Best Fortran IDE Suggestions
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I actually think the idea of a single, unified, development environment like what you're after is somewhat antithetical to OS X design principles. One of the great things I've found, since switching to OS X for development work about a year ago, is that many OS X application developers share my own personal philosophy when it comes to software: do less, but do it really, really well.
As such, my current development environment on OS X is less unified than it was on Windows or Linux, but far, far more stable, robust, and ultimately: productive.
For coding I use TextMate. It seems almost trivially simple at first and then you discover bundles and it's built-in command line filtering and it takes off. It will handle the highlighting tasks you requested. It has projects, and while they seem kind of loose at first, you'll grow to appreciate it. Trust me. And it does handle code completion, tag closing, tag matching -- the sort of stuff you'd expect -- it's just not obvious, but it's there in Bundles and waiting for you to customize it.
Update: I've moved off TextMate and on to Sublime Text 2. The regular updates and the Python-based extensions were a major draw. It's been a year now and no regrets with that switch.
I use Kaleidoscope for diffs. It's just an a beautiful diff tool.
My git tool is Tower and my Subversion tool is Versions. Both awesome.
For permanent, remote drive access via ssh I use MacFUSE to connect to the remote location and mount it as a drive on my Mac. This is a superior option to built-in ssh or ftp support in the IDE because all the programs on my Mac can now work with files on that share.
I also use CyberDuck for it's awesome cost and excellent Amazon S3 support. I could even get away with just CyberDuck, no MacFUSE, if I had to. But I don't. :)
Update: I've switched to ForkLift 2 as my primary means to interact with remote file systems. It's got a nicer UI than CyberDuck and a few less "quirks" to it. I'll still occasionally open up CyberDuck when I need to deliver a signed URL to an S3 object.
Finally: iTerm 2. A terminal app befitting OS X. It really is quite a fantastic terminal. Bookmarks make it easy to get to my AWS machines quickly. The UI is clean. And tabs.
All of those things replace the clunky IDE (Komodo Pro) I use to use on Linux and Windows (and never really liked, just tolerated). And I don't even know that they're not all "unified" in one cluttered, modal window. No sir.
For reference, I write a lot Python, some HTML, JavaScript, Perl, and Java. And the occasional bit of C and C++.
Update: There's more Go in my day to day coding now. My toolset integrated that relatively young language without so much as a hiccup.
OS X will be able to run most of what you want for what you have listed. If you want to run ubuntu, running it in VMWare Fusion is the best option since you won't have to reboot each time. Anything that cant be run on OS X you can just stand up a simple Windows VM on VMWare Fusion todo that dirty work for you.
For Development, you'll be able to run mostly everything that doesn't require .NET or Visual Studio. There is also the mono project for running .NET cross-platform.
Windows is still the dominate platform for games, although their are OS X versions of most of the games you listed, windows is still more likely to be the platform for new games. You could run a copy of windows in VMware Fusion, but I wouldn't count on it doing a ton of heavy graphics processing. Fortunately, it seems like more and more games that are made for iOS are coming to iOS and vise versa.
You may want to ditch OpenOffice and switch to the non-Oracle fork of OpenOffice LibreOffice.
Best Answer
Looks like there is an Eclipse extension for Fortran, aptly called Photran. It should run fine on the Mac.