Here are some links that we have found useful in our work

Operating Systems
- FreeBSD Project.
- Stepwise NeXTStep/OpenStep Server.
- Quick Guide to NEXTSTEP information on the Internet
- NeXTStep heading at Yahoo.
- Mach heading at Yahoo.
- UNIX Guru Universe.
- UNIXhelp for users
- UNIX heading at Yahoo.
- GNU heading at Yahoo.
- MacOS X - Snow Leopard
- DistroWatch maintains a list of freely downloadable UNIXlike operating systems with reviews and news.

Programming
- Generic
  - The Story of Mel is great to put things in perspective if you're having a bad code day.
  - The Copyright Website gives everyone some good advice.
  - jEdit is a free cross platform text editor.
- Language Resources
  - Perl.
  - PerlMonks for solving tough perl problems.
  - C - at Long Island University.
  - JavaScript at Mozilla.
  - Java at Oracle.
  - Stupid Shell Tricks.
  - PHP.
- Databases
  - PostgreSQL - a free, cross platform relational database.
  - MySQL - a free, cross platform relational database.
- Compilers
  - GCC - a free, cross platform C, C++, Objective-C, Fortran, Java, Ada, and Go compiler.
  - G95 - a free, cross platform FORTRAN compiler.
  - Microsoft Visual Studio Express free Windows compiler and IDE.
- FreeBSD
  - wxWidgets is a cross platform development library.
- Macintosh
  - The Mac Resource Page.
  - wxWidgets is a cross platform development library.
- Windows XP/Vista
  - C++ Builder.
  - MS Visual C++.
  - wxWidgets is a cross platform development library.

Commercial Sofware
- Macintosh
  - Bare Bones Software - makers of BBEdit.
- Windows XP/Vista/7
  - Nothing yet.

Freeware/Shareware
- Tips for Free/Shareware Authors covers Win/Mac/UNIX.
- The Copyright Website gives everyone some good advice.
- Macintosh
  - Jumbo Archive.
  - Download at CNet.
  - TUCOWS.
  - Hyper Archive at MIT.
  - Bare Bones Software - makers of BBEdit Lite, a great free text editor.
  - Ambrosia makers of shareware games and utilities.
  - The Well Connected Mac archive.
  - University of Texas Mac Archive
- Windows XP/Vista
  - TUCOWS.
  - Download at CNet.
  - Jumbo Archive.

Computer Books
- "Practical C Programming" by Steve Oualline - good introductory book for C, source code available for download.
- "Practical C++ Programming" by Steve Oualline - good introductory book for C++, similar examples to the C book, source code available for download.
- "Cross-Platform GUI Programming with wxWidgets" by Julian Smart and Kevin Hock with Stefan Csomor - written by the creator of the wxWidgets library.
- "PostgresSQL 2nd Edition" by Korry Douglas and Susan Douglas - good coverage from beginner to expert of the open-source database tool.
- "Scientific C++" by Guido Buzzi-Ferraris - good introduction to C++ for Fortran programmers.
- "Writing Solid Code" by Steve Maguire - how to write bug free code.
- "Debugging the Development Process" by Steve Maguire - how to write bug free code.
- "Death March: The Complete Software Developers Guide to Surviving "Mission Impossible" Projects" by Edward Yourdon - exactly what the title says.
- "Programming perl 3rd Edition" by Larry Wall, Tom Christiansen & Jon Orwant - "THE" perl reference.
- "Data Abstraction and Problem Solving With C++ : Walls and Mirrors Second / 2nd Edition" by Paul Helman & Robert Veroff - good book on data abstraction and management.
- "Numerical Recipes" by William H. Press, et al. - good book on data analysis, source code (C/Fortran/Pascal) available separately on floppy disks.
- "UNIX Power Tools" by Jerry Peek, et al. - a "must read" for any Unix/Unix-like user, a "must have" for any Unix/Unix-like sysadmin, includes many tools and source code on CD-ROM.
- "HTML: The Definitive Guide" by Chuck Musciano & Bill Kennedy - covers all the basics.
- "CGI Programming with perl" by Scott Guelich, Shishir Gundavaram & Gunther Birznieks - covers all the basics of using perl on websites with dynamic content.
- "FreeBSD Unleashed" by Scott Guelich, Shishir Gundavaram & Gunther Birznieks - covers all the basics of using perl on websites with dynamic content.
- "BSD Hacks" by Dru Lavigne - describes 100 hacks (tips) to improve your FreeBSD experience.
- "The Mathematica Book, 4th Edition" by Stephen Wolfram - good overview of basics.
- "NeXTStep Programming" by Simson L. Garfinkle & Michael K. Mahoney - introduction to building NeXTStep applications, includes floppy with source code.

Organizations
- Electronic Frontier Foundation a civil liberties group defending your rights in the digital world..
- GNU - which stands for "Gnu's Not Unix.", promoting a free alternative to Unix.
- The Perl Institute
- National Center for Supercomputing Applications (NCSA).