Blender is the free/open source 3D creation software for everyone, providing individuals and small teams a complete pipeline for 3D graphics, modeling, animation and games.

Handplane has been replaced by a full baking tool and supports normal map outputs for: Source, Unreal, Unity, and other game engines.

Various tools by Cannon Fodder, including:

• 3dsmax import and export plugins for Source engine models
  
• MDL Decompiler, a decompiler for Source engine models
  
• Studiocompiler, a GUI front-end for creating Source engine models and textures

xNormal is a tool to bake texture maps ( like normal / ambient occlusion / cavity maps, etc.. ). It also includes a 3D previewer and Photoshop / 3dsmax / Maya plug-ins.

Facepunch is a thriving community of artists, modders and game developers with a history of ripping games apart and finding out how they work.

Since 1998 Polycount has been offering video game artists a place to learn, critique, and challenge themselves. If you check the credits to your favorite game, there is a good chance a Polycounter had a hand in it.

Reddit powers awesome communities.

TF2Maps.net is a close-knit community for aspiring Team Fortress 2 mappers and content creators. Featuring community owned game servers, map testing of all types and real-time playtest feedback from both fellow mappers and casual players.

The Live Workshop brings you artists from different disciplines across the entertainment industry to help you design along with tutorials and learn the best techniques, work flows, and tricks used by veteran professionals to create high quality art.

The community provides training that educates, entertains & inspires with live stream broadcasts. Interact with artists in-chat as they design and complete concepts, models, textures, illustrations, renders, animations and much more.

Author of HellJumper's Blender 2.5 Modeling Tutorial and the New Beta Importer Modeling Tutorial.

Author of The Beginner's Guide to Custom Hat Models

Author of Facial Flexes tutorial for Blender[napydawise.tumblr.com] and TF2 Import Tools Tutorial

Author of Team Fortress 2 Modelling Resources and Tutorials[www.kritzkast.com]

Author of the Texturing For Team Fortress 2 tutorial[www.polycount.com]

Author of the Jiggle Bone tutorial

Author of Creating Your Own Dota 2 Items

Author of Getting Started on Dota 2 Cosmetics[wyksblog.com]