FreeSerif

fonts-freefont-otf

Freefont Serif, Sans and Mono OpenType fonts

Freefont is a set of free high-quality OpenType fonts covering the UCS character set. These fonts are similar to the widely known Helvetica, Times and Courier fonts.
OpenType fonts based on Computer Modern

fonts-lmodern

OpenType fonts based on Computer Modern

The Latin Modern fonts, also known as "lm fonts", are a set of scalable fonts in PostScript Type 1 and OpenType formats. They are based on the PostScript Type 1 version of the Computer Modern fonts and contain many additional characters (mostly accented ones).
"No Tofu" monospaced font family with large Unicode coverage

fonts-noto-mono

"No Tofu" monospaced font family with large Unicode coverage

Noto is a collection of font families, each visually harmonized across scripts.
Magenta MgOpen TrueType fonts

fonts-mgopen

Magenta MgOpen TrueType fonts

humanist sans serif font

fonts-cabin

humanist sans serif font

The Cabin font comes in 8 styles: Regular, Medium, Semibold, and Bold, with their corresponding italics.
Font that looks like handwritten text

fonts-humor-sans

Font that looks like handwritten text

This truetype font has the typeface that looks like the one used in the popular online comic, xkcd (http://xkcd.com).