I use Excalidraw, File Explorer Note Count, Iconize and Style Settings. As for the theme, I made one.
i use obsidian for
a) work times b) study
for work times, i use periodic notes and the built-in bases (i was using dataview before that) to sum up the months, manage vacay days and shit
for study, meta bind, dataview and callout manager do the heavy lifting
and lastly i hooked the theme into noctalia-shell's mutagen, and notebook navigator for better management.