jbofihe — A Lojban parser

This is available in Debian simply by installing the jbofihe package through apt-get. Ubuntu users might first need to enable universe. Google knows how.

lojban-common - Lojban word-lists

This package installs the standard Lojban word lists into /usr/share/lojban-common. It's available about the same way as jbofihe above.

camxes — A better Lojban parser, written in Java

This package isn't yet available from Debian/Ubuntu. However, it is available via apt.

Add the following lines to your /etc/apt/sources.list:

deb http://www.lojban.org/debian/ custom main
deb-src http://www.lojban.org/debian/ custom main

Then apt-get update and install away.

Note: That apt-repository is signed by Ted Reed's GnuPG key. You may get warnings about it. In order to tell apt that you trust Ted, do the following:

gpg --recv-key D18C1C64 --keyserver wwwkeys.pgp.net
gpg -a --export D18C1C64 | sudo apt-key add -