Real time bandwidth gauge

Hello,

I used a nice tool from SolarWinds Engineers Toolset called 'Bandwidth Gauge' that you would point at a network device using it's IP address and SNMP string and it would come back and list the interfaces you would like to monitor in almost real-time.

https://www.solarwinds.com/engineers-toolset/use-cases/bandwidth-gauge

Does anyone know if there is a free/open source equivalent?

Thanks