Free platform independent network server software for linux

lisp-network-server is a simple framework for writing Common Lisp network applications.

lisp-network-server framework takes care of listening on the network, accepting the connection and starting a new thread with handler functions of your network aware application.

DNA (Deep Network Analyser) is an open, flexible, and extensible deep network analyzer server and software architecture for passively gathering and analyzing network packets, network sessions, and applications protocols.
Deep Network Analyser project is designed to be used for Internet security, network management, intrustion detection, protocol and network analysis, information gathering, and network monitoring applications.
Main features:
- Extensible Java based network sensor (processing layers 2-7)
Configurable processing and output:
- Packet flows like Ethereal
- IP Flows like CISCO netflow
- Stateful Sessions (client/server flow pairs)
- Application protocol element output
- Configurable and extensible application protocol element parsing.
- Application protocol parsing toolkit APIs allows for new protocol parser to be easily developed and extended
- Targeting based full session capture facility, like a realtime targeted TCPDump.
- Flexible targeting from IPAddr, Port tuple to Application sensitive targeting.
- Configurable and extensible output forwarding (file, DB, Streams, JMS, RMI, etc.)
- Extensible realtime collection portable to many OS/Packet processing environments
Easily adaptable to packet processing environments:
- Specialized linux drivers mechanismon
- Network Appliances
- Network Switches / Routers
- Highly mutithreaded for increased performance over multi processor environments
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.

poker-network project includes a poker server, a client library, an abstract user interface library, and a client based on it.

The server deals the cards and checks the user actions using a poker game engine (poker-engine). It listens on a TCP/IP port and understands its own specific protocol. The persistent information is stored in a MySQL database.

The client library implements the poker-network protocol for the client. The abstract user interface library provides a framework based on the client library and suited to implement a user friendly client.

Tiny Sofa is a server targeted, enterprise grade Linux distribution that combines the the vision and expertise of multiple open source developers with the best components and ideas of multiple enterprise focused operating systems.
tinysofa aims to become the de facto community run server oriented Linux distribution, and therefore fill an ever growing void in the availability of a free (as in beer and speech) Linux solution that is deployable in mission critical roles throughout the enterprise.
The meticulously crafted software packages that compose tinysofa, coupled with a focus on security, stability and manageability make it the only completely free Linux solution suitable for enterprise use.
The global network of independent consultants supporting tinysofa aims to level the playing field with the commercial providers of Linux solutions and most importantly, foster local economic growth.
tinysofa is currently used in a vast array of real time business systems that require the utmost in security and stability. From VPN end points, firewalls, bridges and network IDS to application servers and database workhorses, tinysofa has proven itself up to the task.
The 1.x release series will maintain platform stability throughout its lifetime, with ongoing incremental enhancements and security fixes and a minor release every six months. This release series will also be available for the x86_64 hardware platform.
The 2.x release series will feature the Linux 2.6 kernel and will be fully architected around the SELinux security framework. This release series will bring about support for a wider range of hardware platforms, such as ppc64 and sparc32/64.
Enhancements:
- tinysofa classic server 2.0 Update 6 (Ceara) is now generally available. This release focuses on bug and security fixes, integrates all released security fixes, and updates various packages (notably the kernel) to the more recent upstream releases. Ceara features: The Linux 2.6.16 kernel, grsecurity support, APT and SmartPM for advanced package management, the next generation PHP 5 environment (5.0.4), OpenSSH 4.3p2, high availability features such as DRBD (0.7.17) and UCARP (1.1), the latest development tools and languages (gcc 3.4.3, Python 2.4.2), and much more.

The SME Server server and gateway is free software (also referred to as open-source software) and is freely available for anyone to download.
This software is brought to you by the community and contribs.org. Many individuals and organizations (both commercial and non-profit) use the SME Server as their primary network server and gateway.
We would like to remind you that the SME Server software is licensed under the General Public License (GPL). This means that if you alter the software and distribute the altered version, you must make the source code for your altered version freely available.
The GPL is a large part of why free software has made such an impact on the commercial scene. By restricting anyone from making proprietary modifications, the GPL ensures that improvements find their way back to the original code base, thereby creating an explosive rate of technical advance.
The difference between traditional development and GPL development is the difference between a light bulb - where output is radiated in many directions - and a laser - where output is reflected back in a coherent way to produce a greater, more focused result.
Its main design focus is simple, centralized configuration, along with security and ease of installation.
Enhancements:
- This release is based on CentOS 4.5 and all packages have been updated to the latest releases. This release contains many new features, all released updates for SME Server 7.1 and fixes for many reported problems. Upgrades will be available by CD, the Software Installer and command line. All users should upgrade to this release.

Dwarf Mail Server is a full-featured mail server developed on the Java platform, implementing SMTP, POP3 and IMAP4rev1 protocols.
Dwarf Mail Server provides support for rich application message processing via pluggable mail filters and agents, as well as full handling of virtual domains for the SMTP/POP3/IMAP4 protocols, and is free of charge for the binary redistribution.
Since the server is based on the Dwarf framework, it also shares its common design principles and features - simplicity, high modularity and extensibility, authentication and authorization, XML-based configuration, logging and remote management.
Main features:
- ESMTP, POP3 and IMAP4rev1 implementation
- application logic layer provided by mail filters and agents
- virtual mail hosts in SMTP/POP3/IMAP4 server
- application-independent authentication and authorization
- sample JSP-based webmail interface
Dwarf Mail Server is targeted for both end users who are just looking for simple, secure and robust mail server as well as developers who need an extensible and powerful framework for application message processing.
For users with minimal requirements it can offer portability, simple configuration as well as strong security.
- Portability: several OS platforms are supported via the Java technology, including MS Windows, UNIX/Linux/BSD, MacOS X and others.
- Configuration: just 3 lines have to be changed to fire up a sample mail server and a few of them to run a full featured SMTP/POP3/IMAP4 server.
- Security: it uses Java Platform Security Architecture in combination with Java Authentication and Authorization Service (JAAS), as well as SSL/TLS for the secure communication.
Advanced or enterprise users can additionally appreciate performance scalability, multiple domain handling, enhanced security features and modular design easing to incorporate it to the existing infrastructure.
- Scalability: gaining from multithreaded design and dynamically adjustable allocation of resources.
- Multiple domains: server is able to handle multiple virtual domains in a single instance for all SMTP, POP and IMAP protocols.
- Enhanced security: includes subject-based permissions and access control lists for IMAP, SMTP relaying control rules, host-based filtering, SSL/TLS communication, basic anti-spam filtering, etc.
- Robustness: client/server network communication is by design separated from the resource-expensive application logic layer. The server implementation is based on the unparsed byte streams whenever possible, including its own and highly efficient MIME parser.
Dwarf Mail Server also appears to be a suitable platform for application development and customization. Its modular structure and lightweight API allows enhancing existing functionality or completely exchanging the certain part as a whole:
- Message processing: mail filters and agents provide an unique infrastructure for rich message processing.
- Mail queue: physical mail queue representation is abstracted by the API specification and may replaced by a custom implementation.
- Storage subsystem: physical data representation (i.e. messages, folders, configuration options, ACLs) is abstracted by API and may be replaced by a custom implementation based on filesystem, SQL database, etc.
- MIME parser: the parsing engine may be reimplemented for the top efficiency according to the currently used mail storage.
Dwarf Mail Sever has been tested with the most popular mail clients like MS Outlook, Mozilla, Thunderbird, Opera, Apple Mail, Becky!, Pegasus, Eudora, Pine, The Bat! and others.
Other features:
- multi-threaded server
- dynamically adjusted number of active threads
- server API for mail, user data and ACL storages
- robust SMTP server architecture with flexible queue design
- simultaneous deliveries to remote SMTP hosts
- transparent Delivery System Notification (DSN) mechanism
- support for shared mail folders
- fast and universal stream-oriented MIME parser
- runtime server configuration
- built-in SSL/TLS support
- full documentation with user guides and tutorials
- samples with source code

Ekspos is platform independent Java image viewer program. Ekspos Image Viewer support most popular image format: PNG, JPEG, and GIF, where additional image format can be added through Java ImageIO plugin.
It consists of 2 parts: shell browser and viewer. Shell browser allows you to navigate your image collection and youll be able to browse images in tree, detail, list, icon and thumbnail view. The viewer provide progressive view of images with zoom and pan capability.
Main features:
- Image Format (Default): JPEG, PNG, and GIF
- Support ImageIO plugin for additional Image Format
- Support 4 views: detail, list, icon, and thumbnail
- Thumbnail caching for fast preview
- Written entirely in Java