Here are just a few I found in just a few minutes of looking:
https://github.com/Ljove02/AIT-AiTranscribe-MacOS
https://github.com/kitlangton/Hex
https://github.com/cjpais/handy
You can find more here under the "Dictation" tab:
https://docs.google.com/spreadsheets/d/1HtJN4oQ6oBDFmFaF4Qeq...