DigitalMzx: News, previews, reviews, downloads, engines, tutorials, tips and mods.
Just Adventure Review: Description of ZZT by Erik Reckase.
KevEdit: Powerful ZZT Editor.
MegaZeux Game Creation System: Home of the open source MegaZeux project.
Z2: ZZT worlds, news, reviews, utilities, and message boards.
zm: ZZT and MegaZeux - The home of ZZTers Anonymous
ZZTAE: ZZT Advanced Editor.