I use Ubuntu 12.04. I need to do some coding with Fortran 77. I have'nt found any IDE for Fortran 77. What is the solution?
Not a big fan of IDEs, and FORTRAN is kind of a niche (especially 77, you'll be in a world of pain, let me guess: engineering student?). I honestly believe in the "one tool for one job" mantra, and I think a decent text-editor + command line tools is the better choice.
That being said, IDEs are really helpful and I think Photran is the best bet. You will have to install Eclipse 4.2 first.
TIP: Never install Eclipse from Ubuntu's software center, it's really old and won't work for your case. Install Eclipse from their website.