If you see a row of eight accented characters on the left that resemble the ones on the right (not necessarily the same font), then you have a Unicode polytonic Greek font installed and your browser should be ready to go:

ἀέῃϊὸῥϋᾧ      

The fonts below are all freely downloadable.  More commercial and shareware fonts are available, but my goal is to help make Unicode Greek freely accessible.  I have not included several fonts which seem to have some problems or are not intended for general use, such as Arial Unicode MS.  DISCLAIMER:  I make no claims as to the functioning of any of the fonts or software below.  I have tested Aristarcoj with Windows 98, 2000, and XP using four different browsers, and have suffered no untoward effects.  Please use customary discretion when downloading any software.

These fonts contain all of the Greek and Coptic characters, including archaic numerals such as digamma:
	Aristarcoj version 2; download it here
	Arev Sans by Tavmjong Bah
	AttikaU by the American Philological Association
	BosporosU by the American Philological Association
	Cardo by David J. Perry
	CMU Serif (and 32 others in the family!) at Computer Modern Unicode fonts Works in Word and Firefox, but not IE6 on my computer.
	Hindsight Unicode by Darren Rigby
	KadmosU by the American Philological Association
These as well contain all the numerals:
	DejaVu Serif from SourceForge
	Dioxipe from the Elpenor site
	Galilee Unicode Gk by Rodney J. Decker
	Gandhari Unicode from the Early Buddhist Manuscripts Project
	New Athena Unicode from the GreekKeys site
The rest are all missing some numerals:
	Aisa Unicode, packaged with the MultiKey utility
	Alkaios by Lucius Hartmann
	Asteria from the Elpenor site
	Caslon by George Williams
	Chrysanthi Unicode by D. Paul Alecsandri
	FreeSerif from the Free Software Foundation, Inc.
	Galatia SIL from Galatia SIL Greek Unicode Fonts
	GentiumAlt by Victor Gaultney Would be my choice for a "big" Unicode font, if it had numerals and a handwritten theta.
	Georgia Greek, available at Christos A. Sartzetakis' site or the Elpenor site
	Legendum by Rogier van Dalen The larger font, Legendum_legacy.otf, uses precomposed characters.
	Minion Pro Packaged with Acrobat 7; find it in the Acrobat folder, such as C:\Program Files\Adobe\Acrobat 7.0\Resource\Font
	Monospace by George Williams I uninstalled this font because it conflicts with the CSS generic family specifier of the same name.
	Palatino Linotype Packaged with Windows XP/2000; also commercially available.
	Porson by Richard G. Spaulding This font did not display in IE5.5
	Thryomanes by Herman Miller Works in Word and Firefox, but not IE6 on my computer.
	TITUS Cyberbit Basic from the TITUS site
	Vusillus Old Face Italic by Ralph Hancock