Computer Modern is actually a family of fonts, generated using Metafont, free software also created by Donald Knuth (who made TeX). There are thicker variants,

Computer Modern is actually a family of fonts, generated using Metafont, free software also created by Donald Knuth (who made TeX). There are thicker variants, and you can generate more at will. I still think it is one of the most elegant font out there, although I probably wouldn't recommend using it on a webpage.