bbm – "Black­board-style" cm fonts

Black­board vari­ants of Com­puter Modern fonts. The fonts are dis­tributed as Meta­font source (only); LaTeX sup­port is avail­able with the bbm-macros pack­age. The Sauter font pack­age has Meta­font pa­ram­e­ter source files for build­ing the fonts at more sizes than you could rea­son­ably imag­ine.
A sam­ple of these fonts ap­pears in the black­board bold sam­pler.