Open Source Software Library

Anubis is a firewall utility for web servers that "weighs the souls" of HTTP requests to prevent AI and bot traffic from taking up the bandwidth of small organizations. Anubis has seen adoption in a number of open source projects where it is being used to protect source repositories.

HOL Guard is local-first runtime control for AI agents. Installed on the machine, it can gate shell, secrets and file reads, MCP server changes, and plugin or skill installs, then route risky actions through local approvals and receipts. Apache-2.0 freeware. Maker HOL. Homepage https://hol.org/guard. Windows installer and source available. It is not a cloud gateway and not a complete prompt-injection preventer.

Mailmunge is a mail filter based on the Sendmail Milter filtering protocol and library. This protocol is used by both Sendmail and Postfix, allowing Mailmunge to work with either Postfix or Sendmail. Mailmunge connects the Milter protocol to a set of Perl worker processes. This lets you write your mail filtering policies in Perl, and make use of the wealth of CPAN modules available for dealing with MIME and email in general.

Remind is a sophisticated calendar and alarm program. It includes the following features: - A sophisticated scripting language and intelligent handling of exceptions and holidays. - Plain-text, PDF, PostScript and HTML output. - Timed reminders and pop-up alarms. - A friendly graphical front-end for people who don't want to learn the scripting language. - Facilities for both the Gregorian and Hebrew calendars. - Support for 12 different languages.

A toolchain for producing self-hosted vector map tiles from OpenStreetMap and other open data.