Hedge Fund Software

AIOTrade
http://sourceforge.net/projects/humaitrader
http://blogtrader.org/
AIOTrade (formerly Humai Trader Platform) is a free, open source stock technical analysis platform built on pure java. Its pluggable architecture is also ideal for custom features extending, such as indicators and charts. It Requires JRE 1.5.0+.
Auge
http://sourceforge.net/projects/auge
http://auge.sourceforge.net/
Auge is an easy-to-use financial portfolio management application. Auge will help you monitor and analyze your stock and mutual [...]

Curtain Raiser
Like any other set of engineering products, software products are also oriented towards the customer. It is either market driven or it drives the market. Customer Satisfaction was the buzzword of the 80’s. Customer Delight is today’s buzzword and Customer Ecstasy is the buzzword of the new millennium. Products that are not customer or [...]

Check out www.boost.org
A few specifics of interest include Regular Expressions, a soon to be released Time Series, date/time operations, some geometry constructs, state machine tools, and, well, the list goes on.