Chief Database records time series data in real time. Data is compressed to reduce disk requirements and improve performance. Redo logging and caching provide high performance on minimal hardware, with minimal data loss in the event of hardware failure. 1 million coordinates can be processed per second on server-level hardware. All interfaces are SOAP; allowing for easy integration with other systems and Web sites. Data is usually from a telemetered resource, but can also come from SNMP. Chief Trends allows for trending data inside Firefox. Chief Calculator is a Perl calculation engine to manipulate the data in whatever way you want.
Dateutils are a bunch of tools that revolve around fiddling with dates and times in the command line, with a strong focus on use cases that arise when dealing with large amounts of financial data. Their target market is shell scripts that need date calculations or calendar conversions, and as such they are highly pipe-able and modeled after their well-known cousins (e.g. dtest vs. test, or dgrep vs. grep).
jQuery Calx is powerful yet easy to use jQuery plugin for building calculation forms or calculation tables. It parses provided formulae and performs calculations, scans for form changes and updates results automatically, and formats plain numbers into currency format, ordinal numbers, etc. It is suitable for both simple ($A+$B) formulae and complex ones such as ($I*$P*((1 + $I)^$N)) / (1 - ((1 + $I)^$N)).