ClearFoundation

Rome was not built in a day, neither was ClearOS! Using a compilation of proven open source projects, ClearOS has been seamlessly integrated into a single, powerful, easy-to-use platform for network and gateway server within a small business or distributed environments. This list demonstrates the beauty of Linux open source communities. ClearOS avoids vendor lock-in by selecting the best of breed open source solutions from across the globe, free of charge. Below you will find our list of great open source projects contained within our code base.

AMAVISD-NEW

Amavisd-new is a high-performance interface between mailer (MTA) and content checkers: virus scanners, and/or SpamAssassin. It is written in Perl for maintainability, without paying a significant price for speed. It talks to MTA via (E)SMTP or LMTP, or by using helper programs.
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APACHE HTTP SERVER

The Apache HTTP Server Project is an effort to develop and maintain an open-source HTTP server for modern operating systems including UNIX and Windows NT. The goal of this project is to provide a secure, efficient and extensible server that provides HTTP services in sync with the current HTTP standards.
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AWSTATS

AWStats is a powerful and featureful tool that generates advanced web, streaming, ftp or mail server statistics, graphically. It can analyze log files from all major server tools like Apache log files (NCSA combined/XLF/ELF log format or common/CLF log format), WebStar, IIS (W3C log format) and a lot of other web, proxy, wap, streaming servers, mail servers and some ftp servers.
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BACULA

Bacula is a set of computer programs that enable you to manage backup, recovery, and verification of computer data across a network of various computer platforms.
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CENTOS

CentOS is an Enterprise-class Linux Distribution derived from sources freely provided to the public by Red Hat. CentOS conforms with the upstream vendors redistribution policy and aims to be 100% binary compatible.
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CLAM ANTIVIRUS

Clam AntiVirus is a GPL anti-virus toolkit for UNIX. The main purpose of this software is the integration with mail servers (attachment scanning). The package provides a flexible and scalable multi-threaded daemon, a command line scanner, and a tool for automatic updating via Internet. The programs are based on a shared library distributed with the Clam AntiVirus package, which you can use with your own software. Most importantly, the virus database is kept up to date.
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CUPS

CUPS is the software you use to print from applications like the web browser you are using to read this page. It converts the page descriptions produced by your application (put a paragraph here, draw a line there, and so forth) into something your printer can understand and then sends the information to the printer for printing.

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CYRUS

Cyrus is a highly scalable enterprise mail system designed for use in enterprise environments of various sizes using standards based technologies. Cyrus technologies scale from independent use in email departments to a system centrally managed in a large enterprise.
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DansGuardian is an award winning Open Source web content filter that currently runs on Linux, FreeBSD, OpenBSD, NetBSD, Mac OS X, HP-UX, and Solaris. It filters the actual content of pages based on many methods including phrase matching, PICS filtering and URL filtering. It does not solely filter based on a list of banned sites like commercial filters do.
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Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP server. It is designed to provide DNS and, optionally, DHCP, to a small network. It can serve the names of local machines which are not in the global DNS. The DHCP server integrates with the DNS server and allows machines with DHCP-allocated addresses to appear in the DNS with names configured either in each host or in a central configuration file. Dnsmasq supports static and dynamic DHCP leases and BOOTP for network booting of diskless machines.
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GCC, the GNU Compiler Collection, includes front ends for C, C++, Objective-C, Fortran, Java, and Ada, as well as libraries for these languages (libstdc++, libgcj,...).
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The GNOME project provides two things: The GNOME desktop environment, an intuitive and attractive desktop for users, and the GNOME development platform, an extensive framework for building applications that integrate into the rest of the desktop.
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Gallery is a based photo album organizer. Gallery gives you an intuitive way to blend photo management.
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The Linux-HA project provides a high-availability (clustering) solution for Linux which promotes reliability, availability, and serviceability (RAS) through a community development effort. The most well-known component of the Linux-HA project is Heartbeat. Heartbeat sends heartbeat packets across the network (or serial ports) to the other instances of Heartbeat as a sort of keep-alive message.
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Higgins is a framework that will enable users and enterprises to integrate identity, profile, and relationship information across multiple systems. Using context providers, existing and new systems such as directories, collaboration spaces, and communications technologies (e.g. Microsoft/IBM WS-*, LDAP, email, IM, etc.) can be plugged into the Higgins framework. Applications written to the Higgins API can virtually integrate the identity, profile, and relationship information across these heterogeneous systems.

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IPP2P uses suitable search patterns to identify P2P traffic thus allowing the reliable identifcation of traffic belonging to many P2P networks. Once identified one may handle P2P traffic in different ways - dropping such traffic, putting into low priority classes or shaping to a given bandwidth limit is possible. Reducing costs, freeing network resources and therefore improving network performance is often the result of using IPP2P.

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Kolab is a Groupware Solution for Emails, Appointments, Contacts and more. It supports mixed client environments (Outlook/KDE) because of an open storage format. Any email client speaking standard protocols can be served.

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This is the primary site for the Linux kernel source, but it has much more than just Linux kernels.
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The mission of the Mozilla project is to preserve choice and innovation on the Internet. Mozilla.org is the producer and provider of the award-winning Firefox web browser and Thunderbird e-mail software, a software development tools provider, an open source community of developers and testers, and a partner for the technology industry.

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You have a router, you want to know what it does all day long? Then MRTG is for you. It will monitor SNMP network devices and draw pretty pictures showing how much traffic has passed through each interface.
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The world's most popular open source database.
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OpenLDAP Software is an open source implementation of the Lightweight Directory Access Protocol.
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OpenOffice.org is both a multi-platform and multi-lingual office productivity suite and an open-source project.
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The OpenSSL Project is a collaborative effort to develop a robust, commercial-grade, full-featured, and Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library.
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The OpenSRS software platform manages wholesale DNS registery services.

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Openswan is an implementation of IPsec for Linux. It supports kernels 2.0, 2.2, 2.4 and 2.6, and runs on many different platforms, including x86, x86_64, ia64, MIPS and ARM.

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OpenVPN is a full-featured SSL VPN solution which can accomodate a wide range of configurations, including remote access, site-to-site VPNs, WiFi security, and enterprise-scale remote access solutions with load balancing, failover, and fine-grained access-controls. OpenVPN implements OSI layer 2 or 3 secure network extension using the industry standard SSL/TLS protocol, supports flexible client authentication methods based on certificates, smart cards, and/or 2-factor authentication, and allows user or group-specific access control policies using firewall rules applied to the VPN virtual interface.
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Perl is a high-level programming language. Perl's process, file, and text manipulation facilities make it particularly well-suited for tasks involving quick prototyping, system utilities, software tools, system management tasks, database access, graphical programming, networking, and world wide web programming.
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PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.
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PostgreSQL is a highly scalable, SQL compliant, open source object-relational database management system. With more than 15 years of development history, it is quickly becoming the de facto database for enterprise level open source solutions.

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Postfix mail queue is fast, easy to administer, and secure, while at the same time being sendmail compatible enough. Postfix runs on AIX, BSD, HP-UX, IRIX, LINUX, MacOS X, Solaris, Tru64 UNIX, and other UNIX systems. It requires ANSI C, a POSIX.1 library, and BSD sockets.
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What began as a better way to build software--openness, transparency, collaboration--soon shifted the balance of power in an entire industry. The revolution of choice continues. Today Red Hat is one of the world's most trusted providers of Linux and open source technology.
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rsync is an open source utility that provides fast incremental file transfer, data backup and syncrization.
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Samba is an open source/free software suite that has, since 1992, provided file and print services to all manner of SMB/CIFS clients, including the numerous versions of Microsoft Windows operating systems.
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Snort is a software network intrusion detection and prevention system capable of performing packet logging & real-time traffic analysis, on IP networks. Snort was written by Martin Roesch but is now owned and developed by Sourcefire, of which Roesch is the founder and current CTO. Proprietary versions with integrated hardware and support services are sold by Sourcefire.
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SpamAssassin uses a wide variety of local and network tests to identify spam signatures. This makes it harder for spammers to identify one aspect which they can craft their messages to work around.
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Squid is a popular software proxy server and web caching daemon. It has a wide variety of uses, from speeding up a web server by caching repeated requests, to caching web, DNS and other network lookups for a group of people sharing network resources, to aiding security by filtering traffic. Squid has been developed for many years and is considered complete and robust. It supports many protocols, although it is primarily used for HTTP, HTTPS and FTP.
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