AdventNet SNMP API - Free Edition 

AdventNet SNMP API offers a comprehensive toolkit for SNMP-based network management applications. AdventNet's SNMP stack comprises a set of powerful Java SNMP library to build real-time applications for monitoring and tracking network elements.
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Adventnet SNMP Utilities 

AdventNet SNMP Utilities offers a comprehensive toolkit for SNMP-based network management applications. These tools can be used for device, element, application, and system management. Also it is very helpful for debugging and testing.
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Adventnet SNMP API .NET 

AdventNet SNMP API .NET Edition is a comprehensive development toolkit for SNMP-based network management applications. AdventNet's SNMP stack comprises set of powerful .NET SNMP library to build real-time applications for monitoring/tracking networks
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