A list of resources for people writing interactive fiction with Inform 7. Let me know if you see something I should add!
Comprehensive documents
Inform 7 Manual and Recipe Book (available in the Inform 7 download)
Aaron Reed’s Creating Interactive Fiction with Inform 7 (Amazon link)
Jim Aikin’s Inform 7 Handbook
Source code examples for seven complete games
Quick-start guide
Welcome to Adventure: A Quick-Start Guide to Inform 7
Getting help with your game
intfiction.org – support and discussion forums for IF enthusiasts
IFMud – “A MUD Forever Voyaging” – real-time communication with other IF authors and players
Specialized Inform 7 resources
The Inform 7 Standard Rules
Ron Newcomb’s Inform 7 for Programmers
Oliver Reiser’s Inform 7 Cheat Sheet
Emily Short’s Rules Flowchart
Finding games to play and learning more about interactive fiction
IFWiki – the Interactive Fiction Wiki
IFDB – the Interactive Fiction Database, a game catalogue and recommendation engine
Planet IF – a feed aggregate of interactive fiction bloggers
Club Floyd – transcripts of IFMud parser game playthroughs
PR-IF postcard – a strategy guide for beginning IF players
Annual events
IFComp – the Annual Interactive Fiction Competition, showcasing IF games since 1995
SpringThing – traditionally the spring alternative to IFComp; a festival showcasing text-based computer games
IntroComp – a competition in which authors submit beginnings of unreleased IF games