Rootprompt is featuring a thorough overview of The Alex Catalogue of Electronic Texts. The ACET is an Internet-accessible collection of digital documents created using open source tools. The original Alex Catalogue of Electronic Texts was announced as a gopher services by its creator, Hunter Monroe, in 1994 and was a selection of Gopher links. The Alex Catalogue provides "value-added access to some of the world's great literature."
The catalogue is hosted currently on Solaris but none of the system components are specific to any particular Unix version.