A brief guide to computer language sources

Selecting the following will guide you to sources (or meta-sources) for information concerning computer languages, i.e. Fortran, C, Icon, etc.

Fortran and extensions:

Fortran Market: Links to software, compilers, tutorials, documentation, and all other aspects of Fortran 77 (with some Fortran 90 stuff).
[http://www.fortran.com/fortran/market.html]
Fortran 90 Metapage: A veritable plethoria of Fortran 90 links as put together by Bo Einarsson. Everything from F90 manuals in Swedish to links to online tutorials.

Fortran FAQ: This is a list of the most Frequently Asked Questions (FAQs) about the Fortran language and related topics.
HPSC Elements of Fortran: A brief summary of Fortran that is part of a High Performance Scientific Computing (HPSC) course. It is a compressed PostScript document with the file name ElementsOfFortran.ps.Z.
Fortran 90 for the Fortran 77 Programmer: An online hypertext tutorial on how to convert Fortran 77 programs into Fortran 90 programs such as to take full advantage of the new features of the latter.
Fortran 90 Tutorial: An HTML F90 tutorial written by Michael Metcalf, who has also written a book about F90.
A Survey of Fortran 90: A 25 page overview of F90 by Mark Sawyer. It is a compressed PostScript document with the file name tn9204.ps.Z.

FLOPPY (265 Kb tarred and compressed) and FLOW (76 Kb tarred and compressed) are source code processing tools. The former checks a given F77 source code file against various coding conventions and outputs a "tidied" file, while the latter takes a binary file produced by FLOPPY and produces various reports about the structure of the code. There is a hypertext version of the manual available.
Ftnchek (1.2 Mb shell archive) is a package that detects unused, uninitialized and undeclared variables in Fortran source code.
A package f-s2d that converts between Fortran single and double precision is available in three approximately 50 Kb shell archives: part 1, part 2, and part 3.
Portable High Performance Multiprecisions Package by David H. Bailey. This links to a package that contains Fortran-77 routines that perform a variety of tasks in arbitrary precision as well as software that automatically converts a Fortran-77 program to a form amenable to using the multiple precision package.
A really huge amount of numerical software written in Fortran can be found at the netlib repository.
Information about interval computations in Fortran as well as programs can be found.

Programming in C by Dave Marshall is a hypertext introductory course to programming using the C language. Dave also has a hypertext course on X Windows/MOTIF programming. Both are part of a series of hypertext lecture notes and documentation.
Another hypertext introduction to C is the C course of Steve Holmes. This is a part of a series of online training manuals including also an Intro to X Windows by R. B. Rodger.
ANSI C for Programmers on UNIX Systems by Tim Love. This is a sixty page document that aims to introduce C by providing and explaining examples of common programming tasks. It is a 309 kb compressed PostScript document.