Magic: The Gathering tokens?

There really isnt a whole lot of cards that specifically put lots of tokens into play like ERotD but there are some fun ones that work amazingly well with tokens. Doubling Season for instance or Rhys the Redeemed. If you want an amazing token combo, try Essence of the Wild, Ashnod's Altar, and Requiem Angel, you can use Doubling Season with that too. If you sacrifice a creature to the Altar, you will get an Essence of the Wild token back that you can sacrifice to the Altar again and again.

Everyone has made some great suggestions.

I personally like Shrine of Loyal Legions + Parallel Lives. I run a white/green weenie deck and have been able to drop 20 tokens turn 4 or 5. I know it's not infinite, but with other cards (Tempered Steel, Myr Galvinizer, Intangible Virtue, etc.) It is a win condition.

Doubling Season and Parallel Lives let you double the number of tokens you put out.

Ant Queen or Jade Mage + Training Ground let you put tokens out for G each.

Elvish Archdruid + Imperious Perfect + Umbral Mantle + 2 more elves = Infinite Elf Tokens (and Elvish Archdruis and Imperious Perfect infinite power and toughness).

Nothing gets too crazy untell you go infinent tokens really, best thing to do is get doubling season of the much cheeper parallel lifes and use cards like mana reflections and ant queen. Although this is only a good idea in commander.