Everyone (at least anyone who has already wihthdrawn from p0x) knows erc20 tokens. A less known fact is that there are other token standards. In this article, I will present you these less known tokens, and their usage.

I already spent too much time for introducing, so let's start !

1 - ERC721, non fungible tokens

This standard is for Non Fungible Tokens (NFTs) like cryptokitties. It allows making each token unique, so it can be used for things like diplomas or property titles, but its more known use is gaming, with special items.

2 - ERC223, an improved ERC20

ERC223 is an erc20-like token with some useful functions like reversing transaction if we try sending funds to a smart contrat. It also uses a reduced amount of gas compared to erc20.

For making it easier to use, it was intended to be retrocompatible with erc20, so it already can be used with eth wallets like metamask.

3 - ERC827, transferring data with your tokens

ERC827 is a standard that allows adding data to your tx. For example, you can add a message like "It's for yesterday, when you made... for me" to your transactions. 

4 - ERC621, a variable supply

A problem with erc20 is that we cannot change token supply (if we've set a 100M supply but we need for 200M, we can edit supply, but we cannot with an erc20).

5 - ERC20, back to known land

Everyone know erc20. If you want, you can try it by tipping this article (thanks).

And if you see smth to improve (or another erc-something to add), feel free of saying it in the comments.

After doing that, you also can put an eye on tron tokens (trc10/20)