Do you want to exchange bitcoins onchain for altcoins? I hope you're not joking. First, you should stop comparing the "cheap fees" offered by centralized trading services, because it is impossible to find them with the current network conditions.
A good place to go now is currency exchange board^[1], it's completely 3rd party fee-free as long as you trust the person you want to deal with. This is purely based on the network fees.


1. https://bitcointalk.org/index.php?board=53.0