From top to bottom, left to right.
A mix of Greek cavalry.
Greek Hoplites, Thracians and their skirmishers.
A mix of Xyston Athenians and Gladiator Greeks.
All the figures are from Xyston's Athenian DBA pack which is no longer in production.
Update 1 Jan 2007: The Xyston DBA packs have been back in production for a while, including this Athenian DBA pack.
These are some pretty old figures from the 1980s. I think they are Minifigs though they might be Tabletop Games.
2 bases of Greek peltast and 4 bases of Thracian peltasts based as skirmishers. All from Xyston.