It also has command line interface (CLI) which gives interactive console (REPL), so you can learn the usage without hassle.
Supported Salesforce APIs are the following:
- REST API (SOQL, SOSL, describe, etc.)
- Apex REST
- Analytics API
- Bulk API
- Chatter API
- Metadata API
- Streaming API
- Tooling API
node-extendis a port of the classic extend() method from jQuery. It behaves as you expect. It is simple, tried and true.