Bridge between Mac OS & Windows using a Linux like a bridge

Hi ! I need to integrate a Mac Network and a Windows Network, I know that Microsoft has a product called "Bridge Server", it allow me to use Shared Folders made in Windows PC's available to Mac's users, and vice versa, also it allow me to do that with Sharing Printers, does any now know to do that under Linux ? or any Linux commercial product (black box) that allow me to do this. Thanks bye --ed