Communicating effectively with people who are blind or vision impaired - this site explains how to best communicate with people who are blind or vision impaired and normalises it, explaining that it doesn't have to be a big deal, and that your actions are not that different to communicating with people without impaired hearing, you just have to be a bit more understanding and careful.
CHCORG3B: Communication techniques that consider cultural sensitivities, values and practices - i like that this resources explains techniques that will achieve equal treatment, and that will work for everyone.
4 Different Types of Barriers to Effective Communication - this resource is one of the most specific, i like that it really breaks down every barrier, and every component within that, it explains why it is a barrier and why things need to be looked at differently.
Barriers to Effective Communication | SkillsYouNeed - i feel like this site offers an explanation to different barriers to effective communication in a simple, quick way, that you can glance over and instantly understand, it is straight to the point and you're not reading anything that doesn't really matter.
Seven Ways to Better Communicate in Today's Diverse Workplace - Seven Tips for Communicating In Today's Diverse Workplace -… - this resource focuses a lot on everyone being informed equally, working with diversity, and having everyone always be on the same level.
Writing Effective Emails - Communication Skills from MindTools.com - i like how this gives a list of ways to improve professional email writing, and explains what will improve your skills and ways to express what you want to say in the simplest way.