Stanford Encyclopedia of Philosophy, Gottlob Frege. Entry has a biography, chronology, and analysis of Frege's works, chronology of works, bibliography of secondary literature, and links to other sites.
plato.stanford.edu/entries/frege
Stanford's Metaphysics Research Lab web site has a chronology, list of principle works, and reading list for Frege.
mally.stanford.edu/frege.html
Biography of Gottlob Frege (1848-1925) ...
www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Frege.html
Stanford Encyclopedia of Philosophy A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z Frege's Logic, Theorem, and Foundations for Arithmetic Frege formulated two distinguished formal systems and used these systems in his attempt both to express certain basic concepts of mathematics precisely and to derive certain mathematical laws from the laws ...
plato.stanford.edu/entries/frege-logic
The Window -- Philsophy on the WWW. Philosophers Section ...
www.trincoll.edu/depts/phil/philo/phils/frege.html
Friedrich Ludwig Gottlob Frege (1848-1925). His life and works, also secondary sources.
www.findlink.dk/frege/frege.htm