An SNMPv3 engine that is both free and open source is available.
One of the major benefits of this solution is its ability to efficiently handle network devices and data by spreading out the workload across multiple threads. Additionally, openSNMP's support for SNMPv3 means that you can take advantage of its enhanced security features, such as encryption and user authentication.
It's important to note that openSNMP is licensed under the BSD License, which may be a consideration for some users. However, if you're in need of a robust SNMPv3 engine and want to stick to industry standards, openSNMP may be the solution you're looking for.
Version 0.9 Beta: N/A