Most operating systems have dictation capability under Accessibility features:
Apple devices have iOS Dictation
Windows Devices often have a Speech-to-Text that can be turned on in the control Panel (Windows 10, Windows 8 and 7)
Read&Write for Window has a dictation feature called Talk and Type -- download R&W for free
In the Chrome Web Browser:
Google Voice Typing -- can also be used for transcription in the Chrome Web Browser
Dictation for Gmail allows you to compose Gmail email using speech and
Speechify for Chrome allows your computer to read your email aloud.
In Firefox
but I haven't found a Speech-to-text extension. If you know of one, email at@antioch.edu. Until then use the ones for iOS and Windows.
Another option is using Zoom to auto-transcribe.
(customizable toolbar that integrates reading, writing, studying, and research support tools with common applications)