It is just my guess, but most their software is probably developed in-house. This is part of their "edge" over the rest of us.
I don't mean their trading system. I'm referring to the software they use to manage the business side of their operations. Like clients CRM, portfolio reports generator etc.
Given the amount of fog surrounding the numbers that the public gets to see, I think it's programmed by the CFO's 11 year old nephew, probably in Basic. Not too hard to write out a string "NET INCOME... xxxxxxxxxx.xx *" The footnotes have to be outsourced with oversight.
Some use software from SS&C (now owned by Carlyle Group): http://www.ssctech.com/ Since I have never been on that side of the business, I happily know nothing about it, except that it is widely used in the US, and globally.
"inside trader info ver . 4.4444 screw the little guy ver. 1.33 my trades always come 1st! ver. 1" i really did laugh out loud at this
Most small hedge funds have 20 or 30 clients. A simple excel sheet, with a fancy printing format will do.