Runescape, WoW, Eve Online, LOTR Online, the list goes on and on and on............
My Free Zoo is a good and fun game!
A good free online car game is Need For Speed World.
There are many schools that offer free online game design courses. The MIT OpenCourseWare allows students to learn about game development and designs for free.
A good free online home morgage calculator is www.freebyte.com/business/mortgage_calculator.html. Another good option is www.mortgagecalculator.org/.
Some good online avatar based games are Zwinky, Fantage and Second Life. Another good online avatar based game is Habbo.
that's a good game but a better free online game is www.runescape.com try it out!
You can find a good online dictionary The Free Dictionary website. Alternatively, another good online dictionary is the official online Dictionary website.
lemonparty.org
Dragon Fable
tanki online is a good free tank game if you have google chrome you can download it from the store
Blockland , but you have to pay $20 every month. I suggest you to stay in ROBLOX but if your getting old for it try Habbo. Teenagers play it and its free.
Some fun online games for free, similar to Team Fortress 2, are Minecraft, League of Legends, and Ghost Recon. Another free game that is popular is Battlefield Play4free. Planetside 2 by Sony is free and well liked by gamers.