rate-limiter-flexible
Node.js rate limiter by key and protection from DDoS and Brute-Force attacks in process Memory, Redis, MongoDb, Memcached, MySQL, PostgreSQL, Cluster or PM
content-filter
A simple but powerful content-filter. Also provides protection against NoSQL (like MongoDB) injection attacks on Node.js
keyv
Simple key-value storage with support for multiple backends
bson
A bson parser for node.js and the browser