Rogier van Dalen made two OpenType fonts Legendum and Garogier. Released under the GNU General Public License.
Legendum is a typeface not unlike MS's Verdana. It has been made for optimal screen readability. It is anti-aliased on Windows as well. It now contains all normal Latin characters as well as all Greek characters, plus punctuation.
Garogier is a typeface not unlike Garamond (hence the name). It will have optimal size through its instructions (i.e. at low sizes, also when it is used on a high-resolution device such as a printer, the characters are changed slightly to increase readability). This is supported by Windows 98 and up (this includes 2000 and XP). Freetype does not support it (yet).
