SNTS (Simple Network Time Sync) is a simple, fast, and low-overhead time syncronization system for LANs. It is designed as a simple replacement for timed with better time control and better portability (for systems without a standard adjtime() call, such as Linux). It uses broadcasts to negotiate servers and set time, and allows multiple groupings of servers on a network for independent time management for groups or labs. SNTS also supports multiple servers in a single group.
redWall is a bootable CD-ROM firewall which focuses on Web-based reporting of the firewall's status. It includes Snort, snortsam, dansguardian, and support for fwbuilder, squidguard, reporting (using BASE/sarg/ntop/webfwlog), VPN (Openswan/PoPToP/Openvpn), Spam Filtering (spamassassin, dcc, razor2, clamav, amavis-new, dspam and maia mailguard), and mail-based, alerting. Configuration data are stored on a floppy or USB disk.
OmniSync is a driver for NTPd for people who are firewall-challenged. It enables systems to synchronize time when port 123 (UDP) is blocked. It allows you to sync against the daytime service, time, SNTS, IRC, ICMP, SNMP, precision time protocol (PTP -- IEEE 1588), HTTP, HTTPS (both also via proxy server), and (S)NTP via a Socks(5) proxy server. It doesn't directly set the clock, but uses NTPd for this, as this enables you to have multiple time sources as well as bad-chimer detection, etc.