OpenSNMP is described as 'Multi-threaded SNMPv3 engine. This project supports the
Simple Network Management Protocol version 3. In particular, it is
designed to match the architecture of the Internet Engineering Task Force SNMPv3 standard (RFCs 3410-15)' and is a Network Monitor in the network & admin category. There are more than 10 alternatives to OpenSNMP for a variety of platforms, including Windows, Linux, Mac, Android and Java Mobile apps. The best OpenSNMP alternative is TKMib, which is both free and Open Source. Other great apps like OpenSNMP are SnmpB, Net-SNMP, Net-Policy and qtmib.