Wiremaps is an application that gathers layer 2 wiring information on a network using protocols like LLDP, EDP, CDP, and SONMP. It also gathers information from the FDB (MAC-port table on switches), the ARP table (MAC-IP table), and some miscellaneous information like interface names.
lldpd is an implementation of IEEE 802.1ab that provides LLDP sending and reception, It supports VLANs and includes an SNMP subagent that can interface to an SNMP agent through the AgentX protocol. LLDP is an industry standard protocol designed to supplant proprietary Link-Layer protocols such as Extreme's EDP (Extreme Discovery Protocol) and CDP (Cisco Discovery Protocol). The goal of LLDP is to provide an inter-vendor compatible mechanism to deliver Link-Layer notifications to adjacent network devices. The daemon is also able to deal with CDP, FDP, SONMP, and EDP protocols. It also handles the LLDP-MED extension.
sslsweep tests TCP services for the presence of SSL and reports things about the services found, such as the certificate's CN, the certificate's expiration timestamp, what kinds of ciphers the SSL service supports, and what versions of SSL the service supports. It can be used for security testing as well as ongoing monitoring of services. It can produce output in human readable text, HTML, and CSV. It can also run as a Nagios plugin. It can accept input on the command line or on standard input (one host:port pair per line). It can also accept Nmap scan output (in the greppable format) as input, and it will test all open TCP ports found by the Nmap scan.
Fing is a command line tool for network and service discovery. It provides you a complete view of any network in a very short time. Its smart discovery automatically detects the network type and uses the best technique to scan it. The best results are achieved on Ethernet networks (including Wireless ones), where Fing is able to detect all network hosts, firewalled ones included. The service discovery feature quickly detects active TCP services on a target host or network. Fing is based on Look@LAN.
Inject is program which can generate, inject and withdraw BGP routes, with a primary focus on network testing. It supports route and peer flapping, generation of random routes with (pseudo) random BGP attributes via a Cisco like CLI. Other features include a configuration file based on XML, test cases, help functions, and displaying of peer and route information.
RayHttp is a PHP class that provides an HTTP client for sending requests to Web servers. It can configure and send HTTP GET and POST requests using the Curl extension or PHP file access functions. When using the Curl extension, all Curl options may be set changing a class array variable.
SpamCheetah is a network-level spam filtering solution built around OpenBSD greylisting, tarpit, and blacklisting. It comes with a Web interface and requires zero administration. It does not allow spam to even land in your network, thus saving you precious bandwidth. It does not have the 'false positives' problem of losing legitimate mail.