Kharosthi information (includes free Kharosthi font)
http://depts.washington.edu/ebmp/software.html
Kharosthi Unicode proposal submitted by Andrew Glass, Stefan Baums, and Richard Salomon - the above script chart and text sample is based on this
http://std.dkuug.dk/jtc1/sc2/wg2/docs/n2524.pdf
A Preliminary Study of Kharosthi Manuscript Paleography, by Andrew Glass
http://depts.washington.edu/ebmp/downloads/Glass_2000.pdf
ALPHABETUM is a Unicode font specifically designed for ancient languages that includes Kharosthi, and many other ancient scripts
http://guindo.pntic.mec.es/~jmag0042/alphabet.html