Free p2p networking software for linux

Deep Network Analyzer is an flexible, open and extensible deep network analyzer (software server) and architecture for gathering and analyzing network packets, network sessions and applications protocols, passively off enterprise class networks.
DNA is designed to be used for Internet Security, Intrusion detection, Network Management, Protocol and Network Analysis, Information Gathering, Network Monitoring applications.
DNA runs as a distributed application under a Java Virtual Machine (JVM) environment and is portable across many OS environments, including: Network appliances, Switches and Routers.
Main features:
- Deep packet and session processing (layers 2-7)
- Configurable processing and output:
- Layer 4 Packet flows
- Layer 4-7 Stateful Sessions flows (client/server flow pairs)
- Layer 7 Packet and Session Application protocol Parsing (HTTP, DNS, P2P, VoIP, etc)
- Application protocol parsing toolkit enables easy devlopment of new new protocol parsers.
- Support for both symmetric and asymmetric routing links.
- Targeting based full session capture facility, like a real time targeted TCPDump.
- Flexible targeting from IP address, port tuple to application sensitive targeting.
- Configurable and extensible output adaptor utilizing OpenAdaptor able to send output to a varity of resources including: Flat file, Oracle, MySQL, MSSQL, Sybase, Sockets, JMS, RMI, WebService.
- Extensible real time collection engine portable across many OS/Packet processing environment :
- Specialized linux drivers mechanisms
- Network Appliances
- Network Switches / Routers
- Highly paralleliszed for increased performance over multi processor environment
- System metadata dictionary externalizes processing type definition
Enhancements:
- Adoption of OpenAdaptor(tm) as the Output Adapter mechanism.
- Support for local-only administration.
- A new targeted packet capture parser, new run scripts, and a new install mechanism.
- Many bugfixes.

GNOME Network is a set of client network-oriented tools, which currently contains a network information tool, a remote shell and desktop clients and a personal web server and a desktop sharing tool.
GNOME Network is Free Software distributed under the terms of the GNU GPL.
Enhancements:
Updated translations:
- gl (Ignacio)
- it (Alessio)

Noname Network provides a powerful file-sharing network.

The Noname network is a gnutella-based network that features a different and more flexible protocol. The client and network currently support filesharing, but the protocol can be extended to support more features.

Activism Network is a Web-based system that allows activists or anyone else to share contacts, resources (files), events, email lists, and campaigns. etc.

It uses Google Maps.

It is similar to Friendster/MySpace, but more focussed on networking and less on the social aspect.

This area is for developers and users of the software who want to understand how it works, provide feedback, download the source code, report bugs, request features, or otherwise help out.

You can get an account, and then start commenting and writing your own pages.

Java Network Stack provides a Java library for research oriented network programming.

Java Network Stack is a library used by the DIMES project to create new internet measurements. It provides a clean API for packet manipulation, send, receive, filter, and analysis. It is a unification of raw socket capabilities, MAC level networkingm, and IPv6 capabilities.

Java Neural Network Trainer is a neural network trainer with the ability to easily add new training algorithms and training patterns.

Java Neural Network Trainer project includes a parallel training graphical interface where you can view each trainer working in real-time in parallel.

The Torque Network Library project is a robust, secure, and easy-to-use cross-platform C++ networking API designed for high performance simulations and games.
It features a UDP- based connection architecture with DoS prevention functionality, different types of data guarantee, bit stream compression, server object replication and updating, and a simple, highly space efficient RPC mechanism.
It includes a deterministic application journaling replay function for eliminating hard to find networking bugs.
Main features:
- Portable
- Powerful RPC Support
- Lightweight and efficient - not intended to be a replacement for CORBA.
- Extremely easy to use - two simple macro definitions and youre done.
- No complex wrapper classes to work with - write and call your functions as you normally would, and TNL will take care of the rest.
- Robust UDP-based notification protocol
- Supports fixed or adaptive rate data transfer.
- Arbitrary sized packet window.
- Robust connection handshaking.
- Handles packet loss/out of order delivery.
- Networked Objects
- Instantiation of objects by name or ID.
- IDs are assigned to NetGroups, so that only objects relevant to a connection can be references.
- Event Support
- Unguaranteed, guaranteed unordered, or guaranteed ordered event delivery.
- Notification to the event when it has been received or dropped by a client.
- Ghost Support
- Most-recent state information is transmitted to clienst.
- Scoping of objects to only those clients for which they are relevant - this helps prevent cheating or data sniffing and makes dramatically more effective use of available bandwidth.
- Prioritization of state updates by arbitrary criteria, such as relative velocity, team, ownership, etc.
- Extensible Protocol Architecture
- Easy to extend the protocol, for instance, to transmit player move information with every packet, or add voice support.
- See Torque for examples of additional capabilities that could be added to the protocol.