Although I'm just starting out with Plover and steno, I have compiled a collection of dictionaries that I find the most personally useful. There are currently five git submodules that I either use, or keep around and hope to use to some extent in the near future.
Charley Shattuck is the creator of the TinyMod, which is what I will be using to steno.
A layout file for the Layout Display plugin.
Emily's Symbol Dictionary provides a consistent method to type symbols in steno.
Provides a way to repeat successive movement keystrokes.
A dictionary replacement for Plover's default main.json based more definitively on Plover theory than the standard dictionary. It also removes all of the "misstroke" entries from the default dictionary, making learning through word lookups much more reliable.
This dictionary also contains a replacement for the default commands.json and a number input method that replaces the standard.
Creates a way to output raw steno.
Provides strokes for court reporting.
Missing entries from aerickt's plover-base.json provided for ease of merge.
Personal dictionary replacement to user.json default.
Provides an easier way to input numbers when using the TinyMod. Will need to parse for conflicts before using this.
Ted Morin's unmerged additions to Plover's main.json may be interesting to look at later down the road.
This dictionaries library is vast and provides for a lot of use-cases. The following number dictionaries provide important features that will have to be remembered when looking at the completeness of a steno dictionary collection.
Provides for input of ordinal numbers.
Provides for input of large and hyphenated numbers.
Provides for more granular input of times.