steam-tradeoffers is a library for Node.js written in JavaScript. It allows you to automate Steam trading using trade offers. It was designed with node-steam in mind, but does not depend on it directly. Some of the methods of the library are wrappers for Steam Web API.
A Steam Inventory API wrapper with advanced features such as retries and proxy support.
Steam is a library for interactions with Steam, it's written in Go. Steam tries to keep-it-simple and does not add extra non-sense. There are absolutely no internal-polling or such, everything is up to you, all it does is wrap around Steam API.