money-math
jsbn-based arbitrary precision operations on currency amounts "XXX.YY"; because floats are BAD for representing money
jsbn-rsa
Js biginteger and rsa implementation
ecdh
Native node.js module for ECDH and ECDSA
node-jsbnrsa
node rsa module url: http://www-cs-students.stanford.edu/~tjw/jsbn/