Token TrackerERC20

ERC20 Tokens By MarketCapitalization

The ERC20 Token Tracker can search, discover and track all contracts that conform to the ERC20 Token Standard

For an example, check for a sample Token Contract. However, because anyone can deploy an ERC20 Token with their own custom Token Name and Symbol, thus please verify that the contract you are interacting with is the correct one by checking the Contract Address.