ClearOS is an integrated network server gateway solution for small and distributed organizations. The software provides all the necessary server tools to run an organization including email, anti-virus, anti-spam, file sharing, groupware, VPN, firewall, intrusion detection/prevention, content filtering, bandwidth management, multi-WAN, and more. You can think of it as a next generation small business server. Through the intuitive Web-based management console, an administrator can configure the server software along with integrated cloud-based services.
smtpfilter is a filter for an SMTP session which passes the session through transparently in real time, except for the DATA command which is intercepted in order to scan the data for spam and/or viruses with the scanner of your choice. The sources are heavily commented. The default spam filtering is a hybrid approach that uses spamassassin to self-train the excellent spamprobe Bayesian filter which works on a per-site rather than per-user basis. The virus checking can use clamav or NAI, or any other command- line scanner.
Clusters and server farms often have many nodes and very little hardware support for locating and diagnosing problems, especially if the problem involves the network interface. Helpme is a small stand-alone program that allows a node to use the standard PC speaker, both to signal that a problem has been detected and to render arbitrary alphanumeric text using either Morse code or the NATO phonetic alphabet. The input syntax allows repeating messages and more.
Respell converts English text between the American, British, and Canadian spelling conventions. It prompts the user for cases where more than one target spelling could be chosen for a source word. It can also create a 'universal' spelling which can be automatically converted to any of the three without loss of information.