Data Structure & Algorithm

Algorithm:
Algorithm Repository

Book:
Mark Allen Weiss - Datat Structure and Algorithm Analysis in C++ Code

GNU Project

The GNU Info Tree(From University of Utah)

Programming Community

Intel Software Network

C++ Material Website

open-std: C++/POSIX standard
Glen McCluskey & Associates LLC: provides some C++ test suites and performance tips.
Tenouk: Some C++ related tutorials
Curbralan: Have good C++/OOP resources such as papers, tutorials, reports etc.

Bignames

iBjarne Stroustrup: C++'s father
Stan Lippman's Blog: autho of "C++ Primer"
Scott Meyers: The author of Effective C++
Herb Sutter: The author of Exceptional C++
John K. Ousterhout: Invertor of Tcl language.
John Graham-Cumming: Create open source POPFile email filtering program.
Andrei Alexandrescu: author of "C++ Coding Standards" & "Modern C++ Design"
Nicolai M.Josuttis: author of "The C++ Standard Library"
Douglas C. Schmidt: CS professor, have some good material about C++/OOP

Geeky Programmers

Maciej Sobczak: from Switzerland who are master on C++ and Tcl programming.
Brad Appleton's Home Page : a software development specialist.
David A. Wheel
Programmer's Corner@tmh: some c++ and perl resources
The Cantrip Corpus: in the ISO/ANSI C++ Standard committee
Pete Isensee: lots of C++ related papers and presentations

C/C++ Library

Library(computing)-wiki; Program Library Howto;

C Library:
C standard library-wiki
GNU C Library-wiki;
C POSIX Library-wiki

The GNU Readline Library:
GNU readline - Wiki
The GNU Readline Library HomePage

C++ Library:
C++ standard library-wiki
C++ standard template library-wiki
C++ Technical Report 1-wiki
C++ TR1 Information from Scott Meyer
C++ Ox+ - wiki
Dinkum C++ Library
Loki-wiki

GNU C/C++ Library:
GNU Libtool

GNU C Library(glibc): The GNU C library is used as the C library in the GNU system and most systems with the Linux kernel. In general the GNU C library supports the ISO C and POSIX standards.
GNU standard C library ; GNU C Library Manual

GNU standard C++ library
User's Guide to the GNU C++ Library - From Utah University Document Tree

GNU Common C++

STL: STLport ; SGI STL;
Microsoft: MSDN C++ standard library reference;
Boost: Boost; Boost.Python; Boost Trac;
StdExt: StdExt Chinese Version;

Perl

Websites:
perldoc: Perl Programming Documentation

perl.com; perl.org; perlmonk

The Perl Foundation

Modules:
CPAN

Books:

1. Learning Perl 5th Edition [Done]
2. Intermediate Perl [Ongoing]

Perl Google Summer of Code:

Perl and Google Summer of Code 2009

GSoC 2009 Projects

google-summer-of-code-perl-2009-tpf

Python

Python Official Website
Dive Into Python
LearnPython

Linux-Website

Official Website:
Linux Online

FORUMs:
LinuxQuestions.org

Resources:
The Linux Documentation Project

Linuxtopia
LinuxCommand.org
Linux-Tutorial
LinuxLots
FreeUnix-dyndns

Tcl

Wikipedia: Tcl wiki; Tk wiki
Tcl DeveloperSite
Tclers Wiki
Tcl/Tk at SourceForge

Tk Docs

Tcl/Tk Cookbook
C++/Tcl: A C++ library for interoperability between C++ and Tcl.
C++/Tk: A complete C++ interface to the Tk GUI toolkit.

Software Version Control

Subversion:
subversion(wiki)

Concurrent Version System
cvs(wiki)
The CVS Manual - Version Management with CVS

Git
Git - Fast Version Control System

Open Source Software

GNU:
GNU
GNU-FTP
GNU Manual
Free Software Foundation
Free Software Directory

Gnulib - The GNU Portability Library
GNU Libtool - The GNU Portable Library Tool
GNU libtool is a generic library support script. Libtool hides the complexity of using shared libraries behind a consistent, portable interface.

sourceware.org: hosting some free software including GCC, GDB, etc
GNU documentation tree from Utah University

IEEE Std The Open Group
This standard defines a standard operating system interface and environment, including a command interpretere (or "shell"), and common utility programs to support applications portability at the source code level.

Open POSIX Test Suite: A GPL Open Source Project

FOSSLLC: Free and Open Source Software Learning Center

Industry community:
IBM-Open Source
Intel-Software Network
google-code

Free Software Project Hoster:
Savannah; Launchpad; SourceForge; ohloh; freshmeat; github;

Opensource code search engine: Koders

GUI Toolkit

Cross Platform Widget Toolkit:
Wiki: Widget toolkit
Wiki: List of widget toolkit

Qt:
Qt

Qt Centre - The Ultimate Qt Community site
Qt Apps

Qt:

GTK+

Gtkmm:
gtkmm
Glade User Interface Builder

wxWidgets:

wxWidgets