Here is mine:

As config:

custom_commands=sort;sort -u;python3 -mjson.tool;geany_camel_case.py;black --line-length 120 --skip-string-normalization -;sqlformat --reindent -;base64 -w 0;base64 -d;
custom_commands_labels=;;JSON PP;CamelCase;Black Formatter;SQLFormat;Base64 Encode;Base64 Decode;

The geany_camel_case.py script converts snake_case to lowerCamelCase and vice versa. It can be found on https://github.com/eht16/dotconf/blob/master/user/bin/geany_camel_case.py.

If this gets more, it might be good to build a list in the wiki similar to the snippets (https://wiki.geany.org/snippets/start).

@eht16
Ahh thank you for sharing these.
Also, so much information in this post you made I do not even know where to begin :)
Literally have recently been trying to figure out some things with the "sort" command and did not even think about using this with this feature, those are some good ones.

I was not aware/thinking about this having an actual config for this, as you mentioned "As config"
I have to look into this a little more.

I was not even that aware of that Geany wiki page, tons of stuff.

I agree, that is great idea, if enough items are shared here, that could be a good idea to give this feature its own wiki page.
But even the 8 you mentioned and the 1 I mentioned provided by b4n is a good start, I think there is also an example found in the manual as well.

Camelcase makes me think of something I was looking to mention in the past, case based tools. I might make a separate post about this.
I have seen a few posts made by others regarding this, some I can see make use of your Camelcase script so thank you for creating it.

Thank you again for sharing these examples plus all the other information I was not aware of as well.