RRDtool is the OpenSource industry standard, high performance data logging and graphing system for time series data. Use it to write your custom monitoring shell scripts or create whole applications using its Perl, Python, Ruby, TCL or PHP bindings.

Bailout costs more than Marshall Plan, Louisiana Purchase, moonshot, S&L bailout, Korean War, New Deal, Iraq war, Vietnam war, and NASA's lifetime budget -- *combined*!

The Panopticode project provides a set of open source tools for gathering, correlating, and displaying code metrics

ALFRED® allows you to retrieve vintage versions of economic data that were available on specific dates in history. In general, economic data for past observation periods are revised as more accurate estimates become available. As a result, previous vintages of data can be superseded and may no longer be available from various data sources. Vintage or real time economic data allows academics to reproduce others' research, build more accurate forecasting models, and analyze economic policy decisions using the data available at the time.