Fortran For C Programmers — The Flang Compiler

"This note is limited to essential information about Fortran so that a C or C++ programmer can get started more quickly with the language, at least as a reader, and avoid some common pitfalls when starting to write or modify Fortran code."

to fortran language-design ... on 19 July

Software Preservation Group — Software Preservation Group

Some fairly specific archiving projects from CHM -- e.g. as much as they could collect about early Fortran compilers.

to compiler fortran history language-design retrocomputing ... on 13 September 2017

Fortran 90 — Fortran90 1.0 documentation

More specifically: Fortran for Python users. (It probably says something about Fortran that the domain name wasn't already taken!)

to fortran numeric programming python ... on 12 August 2013

Summary of Fortran 95 Language

Quick reference.

to f95 fortran ... on 18 September 2012

Notes on FORTRAN Programming

A bit idiosynchratic, this one, but quite interesting nonetheless.

to fortran ... on 18 September 2012

Numerical Recipes Books On-Line

Precisely as it says. The C style is absolutely horrific.

to c fortran maths research ... on 13 March 2005