Ugarit is a backup/archival system based around content-addressible storage. This allows it to upload incremental backups to a remote server or a local filesystem such as an NFS share or a removable hard disk, yet have the system instantly able to produce a full snapshot on demand rather than needing to download a full snapshot plus all the incrementals since. The content-addressible storage technique means that the incrementals can be applied to a snapshot on various kinds of storage without needing intelligence in the storage itself - so the snapshots can live within Amazon S3 or on a removable hard disk. Similar to Plan 9's venti, but implemented in Chicken Scheme. Encrypting the backup store (called vault) is supported.

Links to the single UNIX Specification (various versions).

9atom augments the plan 9 distribution with the addition of nupas (new mail system), extra pc hardware support, IL and Ken's fs.

The CSS stylesheet might be interesting.

Scripting extension for Firefox. Used
<a>here</a> to make the appearance of pages more Plan9-like.

Literate programs in Haskell and other languages, also for Plan9port.

This project aims to combine the Plan 9 user-space with the Linux kernel, to offer todays developer an exciting environment combining the best features of both the worlds.

Details about Leopards "Time Machine", which appears to be less sophisticated than Plan 9 venti.

It seems that the intersection of people interested in Plan 9 and those interested in Lisp is not empty. Several small Lisp implementations, books (some of them in german) about them and lightweight compilation. Nice essay about the advantages of plain

Useful information about setting up Venti, the Plan 9 block storage system.

Tutorial describing how to set up Plan 9.