Official Xtreme3D website (archived in Wayback Machine):

http://home.tiscalinet.de/xception

Our old Offtop.ru forum (archived in Wayback Machine):

http://offtop.ru/xtreme3d

Xtreme3D GitHub organization. If you want to join it, make a request on the forum or via e-mail: gecko0307@gmail.com.

https://github.com/xtreme3d

Xtreme3D VK group:

https://vk.com/xtreme3d_dll

Timur Gafarov aka Gecko:

https://blog.pixperfect.online

Andrey Gavrilenko aka ANDron23:

https://andron-portal.ucoz.net

Kirill Zhukov aka Machete:

https://www.fl.ru/users/machete/portfolio

Official GameMaker website:

https://gamemaker.io

The legendary blog hosting for Game Maker users. Many renown GM projects lived there:

https://www.64digits.com/

YoYo Games Sandbox archive.

https://www.yygarchive.org/

Game-Maker.ru, a portal of HellRoom Games, has long been the most popular Russian-language GM community.

https://game-maker.ru (archived)

RS Game Maker Community, another very popular Russian GM community of the 2000s.

http://gmakers.ru (archived)

GLXEngine repository (GLScene + GXScene):

https://github.com/glscene/GLXEngine

GLScene SourceForge page:

https://sourceforge.net/projects/glscene

GLScene VK group:

https://vk.com/glscene