There's no good list that I am aware of available online. If you have some specific resorts in mind, it's probably best to list those and get some input on available options. In general, bus service is the most common.
The three monorail resorts obviously have monorail service to the MK and to Epcot. The Poly, GF, WL and FW also have boat service to the MK and you can walk to the MK from the CR. The Epcot area resorts--YC/BC, BW and S/D--have boat transportation to both Epcot and DHS and are within walking distance from both parks too. Other than that, bus service is the only option for resort-to-park transportation.