Just picked up some free s2's and s3's. What can I do with them?

[Falcon935]

These were given to me for free.  Is there anything worth mining?

[Zosinburg]

You can mine bitcoin with them. The reason why they are free is that it is impossible to make money out of it if you pay for electricity.

[Falcon935]

Can I mine any altcoins with them?

[jakals]

Can I mine any altcoins with them?

why not ? if algo is same you can,also i can should you to mine cerium,looks like its the best choice now because of its price.

[adaseb]

You can only mostly mine Bitcoins with them.

[FruitsBasket]

You should start mining right away, because u got them for free so u will be in profit.
With the halving coming up, no time to loose.

[bctmke]

Peercoin is always an option.

[Zosinburg]

You can only mostly mine Bitcoins with them.

If the electricity price is very low, it is profitable to mine the Bitcoin. If it is not low, he will make a loss.

[Legacy2005]

2 choices really.

 1) sell them

 2) mine a sha256 alt coin

[Namiks]

These were given to me for free.  Is there anything worth mining?

Given that you received them for free, you may as well mine with them as you aren't looking for any ROI.

[madmartyk]

If it is still cold out, heat your house with them!! 

[Zosinburg]

If it is still cold out, heat your house with them!! 

that is what I am doing at the moment.

[Tmdz]

The best best thing you can do is sell them on ebay and use that money to help pay for a gpu card.

[BigBoom3599]

Either sell them or mine, mining might not be profitable anymore though so you might have to underclock/volt them.