Kass Basher, hot dog hero and the fashion fever is the best in my opinion. Maths Nightmare, SnowWar2, wrath of snowager and nova defender is also recommended. Last but not least, AD video and other ad games are also very good.
kass basher, meerca, turmac roll. The quick games. Ice cream machine, korbats lab, hasse bounce. For long ones
Sometimes the mirror games are betters. Hot Dog Hero Jungle Raiders Dice of Destiny Neopian Battlefields
sunnyneo.com has a good list of a few games that get good neopoints. same with neopets.com/~jubbyjubjack