jSieve is a Java implementation of the Sieve mail filtering language defined by RFC 3028. Sieve is an extensible mail filtering language. Its limited expressiveness (no loops or variables and no tests with side effects) allows user created scripts to be run safely on email servers. Sieve is targeted at the final delivery phase (where an incoming email is transferred to a user's mailbox). jSieve is implemented as a language processor that can be plugged into any Internet mail application to add Sieve support.
Solido Spam Filter is a high performance, zero maintenance server spam filter. Easy integration is possible through a spamassassin plugin, a SA spamc replacement, sockets, or shell scripts. Its high catch rate and low false positive rates have been proven. The filter will easily handle millions of messages per day on standard modern hardware. All updates are handled automatically.
Sporkie is a challenge/response spam email filter. It uses CAPTCHAs (randomly generated, distorted images of numbers) in order to verify that a person sending email is human. It works in the same manner as the ASK project, except that Sporkie uses CAPTCHAs. The main advantage to using CAPTCHAs is that it catches automated spam bots that don't spoof their email address. With ASK, such bots would get through the system. Sporkie is provided under the OSCL Type-C license.
DisSent (short for "Distribute Sent Mails") is a program for separating your sent mail from a single folder into different folders based on properties of the individual messages in the folder. It scans your mail storage and proposes a set of actions to tidy up your sent mail folders. More precisely, it gives you a list of messages along with proposals on where to move these messages. You can then select the messages you want to move and let DisSent do the actual work.
Spamato is an extensible spam filter system. It is available as an add-on for Outlook, an extension for Thunderbird and Mozilla Mail, and a stand-alone proxy component. It provides a Bayesian filter, a rule-based filter, a Java implementation of Razor (Ephemeral and Whiplash), a filter that queries domains on Google, a collaborative domain, and a collaborative hash-based filter. Graphical statistics explain the efficiency of each filter as well as the overall effectiveness of the whole system.
JHighlight is an embeddable Java syntax highlighting library that supports Java, Groovy, C++, HTML, XHTML, XML, and LZX languages and outputs to XHTML. The library can be used in several ways: embedded into another tool (for instance a blog or forum), through the command-line to generate highlighted files locally, or as a servlet filter to highlight source files on your server on-the- fly. It also supports RIFE templates tags and highlights them clearly so that you can easily identify the difference between your RIFE markup and the actual marked up source.