Google Chrome has a wide variety of applications and extension that are effective and budget friendly. Chrome extensions highlight two important features of assistive technology (relatively speaking)— simplicity and user-friendly supports. Because Chrome connects to your Google Profile, the supports (chrome extensions) follow you anywhere you need!
Here are some great resources for assistive technology chrome extensions:
ChromeBook Apps and Extensions for Learners with Dyslexia
The Richard West Assistive Technology Advocacy Center (ATAC) 