AGI Programmers Wiki
AGI Resources and Documentation
SCI/AGI Programming Community
Nick Sonneveld's AGI Development Site
Lance Ewing's agifans site
Tutorials and Guides on the AGI Programmers Wiki
Detailed information on file formats, interpreter operation and logic programming is available in the AGI Specs documentation, available on the AGI Programmers' Wiki.
Defunct sites via the Wayback Machine:
Peter Kelly's AGI website
Chris Cromer's AGI Web Site
Chris Cromer's AGI & SCI Message Board
Nailhead's AGI Studio Site
The Ultimate AGI & SCI Web Site