Free adventnet simulation toolkit software for windows

AdventNet SNMP API .NET Edition is a comprehensive development toolkit for SNMP-based network management applications. AdventNets SNMP stack comprises a set of powerful .NET SNMP library to build real-time applications for monitoring and tracking network elements that are reliable and scalable.
The .NET SNMP library provides off-the-rack components for trap and table handling and the basic SNMP operations: SNMP GET, SNMP GETNEXT, SNMP GETBULK, and SNMP SET. These components enable simpler and faster development and deployment of SNMPv1 and SNMPv2c management applications that can be integrated into any network management solution.
AdventNet SNMP Utilities provides off-the-shelf components for trap and table handling along with basic SNMP operations, such as SNMP GET, SNMP GETNEXT, SNMP GETBULK, and SNMP SET.
AdventNet SNMP API can be used to build either a two-tier or a three-tier management application. In the two-tier architecture, the management application directly communicates with the agents. In the three-tier architecture, the management application communicates with the agents through a manager-server. For building highly scalable management applications, three-tier architecture is the best option
AdventNet SNMP API consists of a hierarchy of .NET packages that enables rapid development of element and network management applications for a wide variety of domains.It is built upon a layered architecture, which contains the SNMP Package and the Transport Provider Framework, and the MIBs API.
AdventNet provides affordable software for management and provisioning of complex networks, systems, and IT applications and for database migration. With a broad product portfolio and an active customer base ranging from enterprises, equipment vendors, and service providers, AdventNet has emerged as a very affordable and high-quality alternative to expensive software that is common in this industry.

PacketStuff Network Toolkit contains a set of very well-known tools for network analysis, fingerprinting, trafiic monitoring, etc.: ethereal, nmap, ngrep, tcpdump... All these tools are compiled with Packet Sniffer SDK, so you can launch them from any (removable) disk. Installation of the WinPCap is not required. Download, unzip, and run.