Obituary of Karl Popper - Obituary by John Watkins, from the Proceedings of the British Academy. - http://www.britac.ac.uk/pubs/src/popper/part1.html
Liberal Thinkers: Karl R. Popper - A short biography from the site of Liberal International. - http://www.liberal-international.org/editorial.asp?ia_id=678
Karl Popper in Prague - Timeline and documentation of Popper's visit to Prague in 1994, including the text of his lecture at Charles University. - http://www.lf3.cuni.cz/aff/popper_e.html
Karl Popper Biography - Biographic profile of the thinker. - http://huizen.daxis.nl/~henkt/popper-karl-biography.html