I use dummynet on BSD. It is free/open source, but it is also kind of a pain. I was already familiar with Unix, so it wasn't hard for me to adapt, but I wouldn't recommend it to non-unix types.

For IT, playing the “what if” game to predict how a new CRM application would behave over the corporate intranet used to require a stack of equipment and load of ...

You know what makes network administrators happy? Making efficient use of their equipment and eliminating “performance stinks” calls from end-users. Thus, investing in an effective WAN optimization ...