is there a plugin to reduce HTTP request

Hi Am looking to see if there is a plugin that can help reduce http header requests. Therefore the plugin would combine ccs files, js files, use minification and sprite setup

We are using the following for ASP.NET and would like to find a plugin for wordpress that can do the same. see link below

http://requestreduce.org/

I do use w3 total cache but this is not exactly what I need

Thanks