You can technically use any truetype font within Renoise though there are varying degrees of success, and certain fonts won’t work at all (some will actually crash Renoise). Provided that the font works you will probably just need to tweak its size settings a little bit in Renoise’s config file.
I grabbed the truetype version of “Proggy Tiny (Slashed Zero)” and extracted it to C:\Program Files\Renoise\Skin\Fonts
Then I edited the Config.xml which is also found in the fonts directory and changed this:
Here’s a shot of Renoise’s default pattern font in action:
Now here’s Proggy Tiny:
You can immediately see that the “…” character which is specially defined in Renoise’s own font is not present in this other font, but that’s not really a big hassle.
And just for fun, here’s Renoise with Proggy Tiny used for every font in the config: (click for a bigger screenshot)
Some weird activity on the tabs at the bottom of the screen but nothing serious.