I know that long back Dr. Leszek Demkowicz finite elements codes(1Dhp,2Dhp,3Dhp) were available in his website. I'm finding it difficult to locate it now. Is there any alternatives available to these codes in FORTRAN(77/90) only.
Prof. Demkowicz has asked me to post the following reply (I have slightly edited it so that fits better with the site's format):
The (old) 3D code has been described in the second volume of our books. It is still in use by my colleagues in Cracow including Dr. Rachowicz. Please contact him directly for a working copy of that code. Again, it is impossible to use that code w/o reading the book first.
We have a new, very powerful 3Dhp code (developed by current students) that it is accessible to my collaborators. Interested parties should get in touch with me directly...
I think the code was also distributed with his books. But you may just want to write him an email :-)
Dr. Demkowicz's codes are pretty unique, so you aren't going to find a complete alternative, in any language.
If you are just looking for a Fortran code, you can get FEAPpv
I have these codes on my computer (files: tar1d.tgz, tar2d.tgz, and tar3d.tgz). I downloaded them from his website a year ago, or so. I just like collecting codes, I'm also looking for some (if someone could help me find Orszag's CENTIKUBE it would be great).
You may contact me and I'll forward them to you.