Alduin (requires condensed version of the DejaVu font).
Curvy (uses DejaVu Sans condensed font).
Cocoa (uses Arial font).
What it means if you have no font specified in a theme? Well, theme engine will simply fall back to some other font. It’s not critical, but it’s recommended to have specified font installed.
And a reminder: you can use “–list” command line option to see where you can place your themes. The first one is very likely located in your home directory (“~/.local/share/bmpanel2/themes”).
And one more thing worth to notice. You’ll need the latest git version to have the best experience with these themes.