- JSONSelect 1,559 CSS-like selectors for JSON
- yajl 1,495 A fast streaming JSON parsing library in C.
- node-memwatch 1,476 A NodeJS library to keep an eye on your memory usage, and discover and isolate leaks.
- node-toobusy 1,099 Build Node.JS servers that don't fall over.
- node-compute-cluster 398 NodeJS library for distributing computation across multiple processes.