Switch Access and Activity Resources:

Online Switch Games:
Tarheel Gameplay - a collection of free, easy-to-play, and accessible games, speech enabled, accessed using multiple interfaces
Talking Book Library - clickable books for all ages
Knee Bouncers - online games
Shiny Learning - Some free and subscription-based online games
HelpKidzLearn - Subscription-based games and activities

List of Switch Accessible Sites - from Teaching Learners With Multiple Special Needs
List of Switch Accessible Sites - from Students With Difference

Switch Accessible Software
Inclusive TLC
Judy Lynn Software

iPad Apps
List of iPad Apps - from Enabling Devices
List of iPad Apps - from Jane Farrell
iPod/iPad Access Ideas - from Teaching Learners with Multiple Special Needs

Resources
60 Things to do with a Single Switch - from Teaching Learners with Multiple Special Needs
Tips, Tricks and Ideas for a Single Switch - from TalkSense