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This PHP extension allows you to find the location of an IP address - City, State, Country, Longitude, Latitude, and other information as all, such as ISP and connection type. For more info, please visit Maxmind's website.

OWAMP is a command line client application and a policy daemon used to determine one way latencies between hosts. It is an implementation of the OWAMP protocol as defined by http://www.rfc-editor.org/rfc/rfc4656.txt. (When referring to the protocol within this document, "OWAMP" will be in italicized. In all other instances, "OWAMP" will be referring to this implementation.) With roundtrip-based measurements, it is hard to isolate the direction in which congestion is experienced. One-way measurements solve this problem and make the direction of congestion immediately apparent. Since traffic can be asymmetric at many sites that are primarily producers or consumers of data, this allows for more informative measurements. One-way measurements allow the user to better isolate the effects of specific parts of a network on the treatment of traffic.

OpenH323 is a multi-platform H323 Video Conferencing library. This is used to make H323 Video Conferencing applications like GnomeMeeting and ohphone. (both in the FreeBSD ports tree) The library includes a sample program called simph323. The OpenH323 library makes use of PWLib. http://www.equival.com PWLib is a multi-platform code library that can be used to write applications that will compile and run on the BSD Unixes, Windows, Linux and a few other Unix variants. It was developed by Equivalence Ltd Pty.

OpenOSPFD is a FREE implementation of the Open Shortest Path First Protocol. It allows ordinary machines to be used as routers exchanging routes with other systems speaking the OSPF protocol.

OpenSIPS (Open SIP Server) is a mature Open Source implementation of a SIP server. It includes application-level functionalities and is the core component of any SIP-based VoIP solution. With a very flexible and customizable routing engine, OpenSIPS unifies voice, video, IM and presence services in a highly efficient way, thanks to its scalable (modular) design. It is reliable and fast, for enterprise or carrier-grade use cases.

opentracker is a open and free bittorrent tracker project. It aims for minimal resource usage and is intended to run at your wlan router. Currently it is deployed as an open and free tracker instance.

Open vSwitch is a production quality, multilayer virtual switch licensed under the open source Apache 2.0 license. It is designed to enable massive network automation through programmatic extension, while still supporting standard management interfaces and protocols (e.g. NetFlow, sFlow, RSPAN, ERSPAN, CLI, LACP, 802.1ag). In addition, it is designed to support distribution across multiple physical servers similar to VMware's vNetwork distributed vswitch or Cisco's Nexus 1000V.