Librexsend is still being worked on as is another project that was previously unannounced. That item is a credit card withdraw for LXC coins. You can use any Visa or Mastercard to withdraw Librexcoin anywhere those cards are accepted.
We are also looking for any devs that can make apps for Librexcoin such has a real HTML5 wallet and other things. Anyone intrested to join us or has a skill to offer please pm me here.
I got curious and started researching Zerocoin and Zerocash in this forum and it appears that stuff is nowhere near ready yet so if Librexsend requires that well I guess that answers that
Librexsend doesn't require it. In fact it has nothing to do with it.