HTML Purifier 3.3.0 is fixes a number of obscure bugs reported and fixed
over a four month period.  It is probably the last release in the 3.x
series.  Notable new features include support for the overflow CSS
property; notable bugfixes include fixed YouTube rendering in certain
versions of Firefox, CSSDefinition Printer, improved early PHP support
and bugs in iconv.
http://htmlpurifier.org/

OpenNetAdmin provides a database managed inventory of your IP network. Each host can be tracked via a centralized AJAX enabled web interface that can help reduce tracking errors. A full CLI interface is available as well to use for scripting and bulk work. We hope to provide a useful Network Management application for managing your IP subnets and hosts. Stop using spreadsheets to manage your network! Start doing proper IP address management!

http://opennetadmin.com/

OSSEC is a scalable, multi-platform, open source Host-based Intrusion Detection System (HIDS). It has a powerful correlation and analysis engine, integrating log analysis, file integrity checking, Windows registry monitoring, centralized policy enforcement, rootkit detection, real-time alerting and active response.

phpMyBackupPro v.2.1

- backup of one or several databases with or without data, table structure, …
- three types of compression (no compression, gzip or zip)
- scheduled backups (by a small PHP script which must be included in an existing PHP script)
- interface for managment of the backups (viewing, restoring, downloading, deleting)
- backup directly onto FTP server and sending of backups by email
- platform independent – only webserver and PHP needed to run e.g. on MS Windows, Linux or Mac
- shell mode (to use manually or by cron script)
- backup of whole file directories (on a FTP server).
- backup databases from different accounts on several MySQL servers
- one installation can be used for all MySQL users of one MySQL server (used by webhosters)
- highest security through two alternative login methods (HTTP or HTML authentication)
- easy to use interface and very easy to install
- several language packages available
- online help (included in pMBP) and FAQ on this website

Teamwork is a proven, reliable and friendly web based software solution for managing work and communication in any field. Groupware and project management features are used in an integrated environment, from which you can coordinate and manage hundreds of projects at once. Teamwork is easy to use, so that an extended team can contribute; it is also capable of handling complex projects.

http://www.twproject.com/download.page