Apps similar to BandwidthD include CacheGuard Gateway, which is free and open source. Other options are ntop, nload, vnStat and darkstat. In total there are six Network Monitors like BandwidthD for Linux, Mac, Windows and self-hosting.
CacheGuard Gateway is a free, open-source network security appliance for startups, growing businesses, and SMEs/SMBs that need enterprise-grade protection without the complexity or cost.
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NTop is a hybrid layer 2 / layer 3 network monitor, that is by default it uses the layer 2 Media Access Control (MAC) addresses AND the layer 3 tcp/ip addresses. ntop is capable of associating the two, so that ip and non-ip traffic (e.g.
nload is a console application which monitors network traffic and bandwidth usage in real time. It visualizes the in- and outgoing traffic using two graphs and provides additional info like total amount of transfered data and min/max network usage.
vnStat is a console-based network traffic monitor for Linux and BSD that keeps a log of network traffic for the selected interface(s). It uses the network interface statistics provided by the kernel as information source.
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darkstat is a packet sniffer which runs as a background process, captures network traffic, calculates statistics and serves them to a web browser.
OphanimFlow is a NetFlow aggregation and graphing toolkit that collects, classifies, and visualizes traffic data for each host in specified networks, providing detailed bandwidth usage and traffic accounting.
