I started using the Silverleaf VMSpc back in 2013 and it worked well up until this year, I was using a Sony Vial laptop for the display and it started dropping the connection I even had another Viso but I couldn't get it to recognize the Com port. So I bought a new Windows Surface Go 2 tablet and it works great. So I'll keep the Silverleaf.
But there are at least two other monitoring systems.
Scanguage makes one, that does provide monitoring info but (from what I've read) only displays 4 items at a time. Have to pick and choose what you want to see.
Bluefire is a wireless system that connects your phone or display via Bluetooth. It is similar to the Silverleaf in that you can customize your display to see what you want to see.
Right now I have mine set up to show me oil pressure, engine temp, charging voltage, transmission temp, boost, rpms, HP, and some other engine parameters.
Also have a fuel tank and trip monitor, showing fuel consumption and amount left in tank and miles to empty, very accurate.
Also has a trip log, which comes in handy on long trips, showing MPG and miles traveled.
Also have alarms for high or low voltage, low oil, high engine and transmission temp. You can choose the set points and how it alarms. This saved my bacon when something punched a hole in my radiator and I started loosing coolant and was showing high engine temps.