There are zero transaction fees on the Steem network.
The Steem blockchain operates with three (3) second block confirmation times.
The Steem blockchain is scalable to tens of thousands of transactions per second.
API documentation for developing with Steem.
Steem.js the JavaScript API for the Steem blockchain.
Radiator is a Ruby API client for Steem blockchain.
Steem-python is the official Steem library for Python.