Google Talk for Developers
Provides three open source API to allow developers to use the protocol in theirs applications.
http://code.google.com/apis/talk/talk_developers_home.html

Web Developers Index
The world's largest index site for web developers
http://www.developersdex.com/

Developers Newsletter
A free email publication aimed at encouraging software developers to start their small business.
http://www.latiumsoftware.com/en/developers/index.php

Developers.Net
Software Development Resources - Developers.net is the best place on the web for articles, downloads, and tutorials for web developer and computer programming professionals.
http://www.developers.net/

DeveloperLand
A programming website managed and run by .NET developers aiming to help other developers. Articles, downloads, reviews.
http://www.developerland.com

WinDev
Win-Dev 2004—the premiere conference for .NET developers—offers you more coverage of advanced .NET technologies than any other conference.
http://www.butrain.bu.edu/windev/

Free software for developers
A few programs from Anand Rajiva. Not just for developers.
http://software.eng.rajiva.de/

Gathering of Amiga Developers
Offers tools and files for developers.
http://www.geocities.com/SiliconValley/Orchard/1225/main.html

UBB Developers Network
Where UBB.Threads developers come for answers.
http://www.ubbdev.com/

NC Laboratories Inc.
Developers of Java enabled middleware interfacing technologies, developers of NCMyner - web based mining suite.
http://www.nc-labs.com