Help with obd2 softwares

Hello, well I want them to help me with everything related to the diagnosis of vehicles through PC softwares, that they work with OBD2.

I do not know if there is a topic on this matter on the page, look and do not find anywhere, if I appreciate it, I tell me

I have an Elm 327 interface and I have some programs such as Digimo, Scanmaster among others but I cannot connect that they connect to the vehicles, I would like to tell me if there is any multi -brand or where the full version of these is achieved, also know what kind of vehicle they work with each of them.

Thanks in advance

I am also interested in this issue, because I have several vehicles and although I connect to the computer I can not connect with any ECU