Software and Documentation

Beautifiers and Pretty Printers
Best of ZSH Tips
Best Practical
chubin/cheat.sh : the only cheat sheet you need
Codewars
Crafting Interpreters
Designing an Authentication System: a Dialogue in Four Scenes
Essays on programming I think about a lot
Flight Gear Flight Simulator
Free UML, BPMN and Agile Tutorials - Learn Step-by-Step
Gitea git repository server
GitHub - EbookFoundation/free-programming-books: :books: Freely available programming books
Gnu Documentation
hacker-laws
How to Create Your Own SSL Certificate Authority for Local HTTPS Development
Internet RFC/STD/FYI/BCP Archives
Julia Evans
LFTP - sophisticated file transfer program
Life with qmail
Manx - Catalog of Online Computer Manuals
Mathematics for Programmers
Meld
Multicast over TCP/IP HOWTO
MySQL Documentation
MythTV
The Next 700 Programming Languages
OpenVPN project
Parsing Expressions by Recursive Descent
PDP-11 Home Page at metalab.unc.edu
PDP-11 - Introduction
perlgov - Perl Rules of Governance - Perldoc Browser
Producing Open Source Software
Protocol Buffers - Google Code
qmail-spp - Home
RealPlayer Home Page
RT Wiki
SANE - Scanner Access Now Easy
Schedules Direct - TV listings for MythTV
SSH: Convert OpenSSH to SSH2 and vise versa
Stack Overflow - Q&A
The Graphics File Format Page (2D specs)
UK Mirror Service: sites/www.bitsavers.org/bits/DEC
Unicode Character Code Charts
UNIXguide.net AIX, FreeBSD, HP-UX, Linux, Solaris & Tru64
Version Control with Subversion
Vintage BASIC - Games
Welcome to the Linux Graphics Driver from Intel site | Graphics
Winsock Programmer's FAQ
Writing Programs with NCURSES
XMCD Home Page
Xterm Control Sequences
Zsh unix shell

Android

Android Developers
Android Development
Introduction to Android Development

BSD

DaemonForums - BSD forum
NetBSD/alpha
NetBSD/vax
OpenBSD
OpenBSD/alpha
OpenBSD Frequently Asked Questions
OpenBSD Handbook
OpenBSD Porter's Handbook
OpenBSD ports
OpenBSD Ports: Working with Ports
OpenBSD/vax
The NetBSD Project

C/C++/OO

Alex's Software
An Interview with A. Stepanov for Edizioni Infomedia srl
Bjarne Stroustrup
Boost C++ Libraries
C++17 in detail (book)
C++ Archive
C++ in the Real World
cplusplus.com - The C Resources Network
cppreference.com
Dr. Charles R. Severance Home Page
Fluent C - Jonathan Boccara's blog
GitHub - cnjinhao/nana: a modern C GUI library
GitHub - qPCR4vir/nana-docs: A Nana offline doxygen dodocumentation project
Guru of the Week
Home · qPCR4vir/nana-docs Wiki · GitHub
Learn Contemporary C | Concise&Visual Examples | hacking C
Modern C++ Tutorial: C++ 11/14/17/20 On the Fly
Nana C Library
STLport Home Page
The ADAPTIVE Communication Environment (ACE)
The Boost C++ Libraries

CD-R/RW

CD-R FAQ

Flex

6800 instruction set
FLEX 2.0 For SWTPC 6800
FLEX Softwae Archive
GitHub - jefftranter/6800: Code related to the Motorola 6800 microprocessor.
GitHub - jhallen/exorsim: Motorola M6800 (6800) Exorciser / SWTPC emulator
MC6800 Instruction Set Summary

Home Networking

Asuswrt-Merlin
Dong Knows Tech
OpenWrt Project
Router Security

iPhone

Building iPhone Apps with HTML, CSS, and JavaScript
iui - UI Framework for iPhone WebApp development

Java

ANTLR
Apache Ant
Apache Maven
Getting Started with JavaFX
IntelliJ IDEA
Java Tutorials - Online Training and Tutorials from Sun
NetBeans Docs & Support
OpenJDK
OpenORB On SourceForge
Programming tutorials, problems, solutions. Always with code.
Sun's Java Home Page
The Jakarta Project
Tritonus: Open Source Java Sound

LDAP

LDAP HOWTO
LDAP Roadmap
OpenLDAP Home Page
PADL Software Pty Ltd - Documentation and Open Source Tools

Mac OSX

Homebrew Package Manager
MacPorts Guide

Multimedia

ardour | the new digital audio workstation
Audacity Audio Editor and Recorder
CD Paranoia audio CD digital audio extraction application
GramoFile Home Page
Hydrogen advanced drum machine for GNU/Linux
Planet CCRMA at home
Rosegarden: music software for Linux
Strawberry Music Player
TAP-plugins
The CAPS Audio Plugin Suite

OpenVMS

The DEC Connection - A premier interactive networking organization for former Digital Equipment Corporation employees
DECUServe on-line
Documentation -- VMS Software, Inc.
HoffmanLabs
HP Communities OpenVMS Community Forum
List of Products from VMS Software, Inc.
OpenVMS Freeware
VMS/RMS INTERNAL DATA STRUCTURES
VMS Software, Inc.
VT100.net: VT330/VT340 Programmer Reference Manual
WASD - The only Web environment implemented expressly for VMS

Oracle

ArsDigita Systems Journal: Fault Tolerant Oracle Installation
One-Page Oracle API, Oracle Call Interface Template Library (OTL), Version 2.0.0

Perl

Comprehensive Perl Archive Network (CPAN)
CPAN Searches
CPAN Testers
FormBuilder Perl CGI Form Builder CPAN module
Higher-Order Perl
Mojolicious - Perl real-time web framework
PAUSE Documentation
Perl Authors Upload Server (PAUSE)
Perlbrew
Perl DBI
Perl Documentation
Perl In 20 Pages
Perl Infrequently Asked Questions List
Perl Maven - for people who want to get the most out of programming in Perl
Perl Monks
Perl Reference Guide
The Perl Home Page
ActivePerl 5.8 - Online Docs : Tk
TkDocs Home
VMS Perl | Perl on OpenVMS
WAIT - The Great CPAN Search Engine

PostgreSQL

Cygwin allows PostgreSQL to run on Windows
Documentation
General Bits - mailinglist summaries
JDBC Driver
Lesser Known PostgreSQL Features | Haki Benita
ODBC Driver
PostgreSQL
PostgreSQL, Inc.
Streaming Replication - PostgreSQL wiki
The Internals of PostgreSQL

Python

An Intro to logging
Django Web Framework
Practical Python Programming - a course by @dabeaz
PyCoder's Weekly | A Weekly Python E-Mail Newsletter
PyCoder's Weekly Issue Archive
Python 2 to 3 conversion
Python 3 Documentation
Python PostgreSQL tutorial with psycopg2 module
Python Weekly : A Free, Weekly Python E-mail Newsletter
Welcome to Python.org

SimH

DSM-11 - PS8 - Computing & Engineering
GitHub - simh/simtools: Tools useful when using or migrating to or from a simh simulator environment
Open SIMH · GitHub
simh github repository
SimH Home Page
The Simh Mailinglist Archives
SIMH on SourceForge.net
Xhomer project - Pro 350 emulation

SQL

Modern SQL : A lot has changed since SQL-92
SQL Indexing and Tuning e-Book for developers

SSH

How to properly manage ssh keys for server access

Web

12 Modern CSS One-Line Upgrades | Modern CSS Solutions
A List Apart
Amaya Overview
Analog: WWW logfile analysis
Cascading Style Sheets, level 1
Cascading Style Sheets, level 2 revision 1
Choosing an HTTP Status Code
Code Charts - Scripts
Colour Contrast Check - snook.ca
CSS3 Media Queries
CSS - Contents and compatibility
CSS Font and Text Style Wizard
demoroniser - correct moronic and gratuitously incompatible Microsoft HTML
Global Authoring Practices for the Mobile Web
Google Calendar APIs and Tools - Google Code
HTML 4.0 Special Entities
HTML Home Page
osCommerce , Open Source Online Shop E-Commerce Solutions
PHP: Hypertext Preprocessor
Randal's WebTechniques columns
Serendipity Weblog System
SitePoint : New Articles, Fresh Thinking for Web Developers and Designers
The W3C CSS Validation Service
The W3C Markup Validation Service
W3C HTML Validation Service
W3Schools Online Web Tutorials
ZVON.org - XML related information and tutorials

XML

The XML C parser and toolkit of Gnome
XML Schema Part 0: Primer Second Edition

X Windows/Motif

About ViewKit
Motif Books
Motif Programming - Dave Marshall
The Motif Zone
The Xarm Home Page
xterm / Escape Sequences