Sites with links to reusable software components

Ada

• Free Ada Software provided by Belgian Ada users
• Free Ada Tools and Libraries

APL

• The APLTree project; APL tools and utility library

BASIC

• FreeBASIC Extended Library

C/C++

• C++ Packages for Various Applications
• Reviews of C++ class libraries
• C++ class libraries
• C User's Group collection
• The GUI Toolkit, Framework Page

FORTRAN

• Free FORTRAN software

Java

• Giant Java Tree

JavaScript

• JavaScript scripts
• NPM node.js software repository

LISP

• CMU Artificial Intelligence Repository

MATLAB

• MATLAB contributed software

Pascal

• Pascal Game Libraries

Perl

• Comprehensive Perl Archive Network (CPAN)
• Free perl CGI scripts archive
• The Perl Archive

Python

• PyPy Python Package Index

TCL/Tk

• Great Unified Tcl/Tk Extension Repository
• Extensions for Tcl and Tk

Assembly language and embedded CPUs

• List of shareware 80x86 assembly language libraries
• Motorola M6800 User Group Library
• Microchip PIC Software Libraries

Multiple Languages

• Planet Source Code
• Black Duck Open Hub Code Search
• RocketAware software developer's index
• Free programming source code for C, C++, Perl, Java, Visual BASIC, etc. under Windows and UNIX.
• CGI Resources

Mathematics and numerical analysis

• Netlib searchable mathematical repository (FORTRAN and some other languages)
• NIST Guide to Available Mathematical Software
• Mathematics Software

More Than Just Libraries

• Github
• SourceForge
• IBM software search

back to Dan's software home page

The original version of this list debuted around 1999; links were last updated March 2016, but this list is no longer actively maintained. These days, there are better ways to find reusable software components.