Automated stock market trading demos and tools, by Nicholas Bradford. All are deprecated as of September 2016. Here's an example of an SVM-based algorithm running with Quantopian/Robinhood (see QuantopianArchive for template):
Algotrader: Demo of machine-learning based stock trading strategies.
QuantopianArchive: Algorithms and templates for use with Quantopian.
Webscraper: Tool for tracking multiple live algorithms.