Bitcoin-notifier is a project mainly written in Python, it's free.
Script to scrape data about the current BTC value and notify user
This is a quick dirty hack to extract trading and currency information about Bitcoin from UOL and BitcoinCharts. The script is meant to be called repeatedly as a cron job on Linux.
The script should be able to send desktop notifications when something interesting is happening. Future plans include integrating with Google Docs in order to update info on a spreadsheet.
BeautifulSoup >=3.0.2