Data.js - Data Manipulation and Graph Persistence for Node.js and the Browser.
jaylist - kv-list inspired by Python.
Queue.js - Simple, efficient queue.
Prefixsearch.js - Trie-backed prefix search library.
Buckets - A complete, fully tested and documented data structure library written in pure JavaScript.
dict - Easy but safe string-keyed store
bloomfilters - Several bloom filter implementations, and an implementation of the CONCISE bitmap.