These are themes that originally were included in the Tiki archive but have been removed, for license incompatibility or to reduce the archive size. They work fine with older TikiWiki versions, but aren't current with new Tiki versions, so they may not support all current Tiki features and style elements. Available at the TikiMods archive, they are listed here for the sake of completeness.
Table of contents
3dblue

Version: 1.2 - Licence: GNU/LGPL
Blue and 3D
Akwa

Version: 1.3 - Licence: GNU/LGPL
Looking like MacOSX
Bluemetal

Version: 1.2 - Licence: GNU/GPL
Theme borrowed from another CMS.
Classicblue

Version: 1.1 - Licence: GNU/GPL
Variation of BlueMetal
Greenjelly

Version: 1.2 - Licence: GNU/LGPL
British taste
Greenmetal

Version: 1.2 - Licence: GNU/GPL
Theme borrowed from another CMS. (Background image is missing from archive. Change body background color in stylesheet, as a workaround.)
Isabelsworld

Version: 1.1 - Licence: GNU/LGPL
The theme of Isabel.
m508

Version: 1.1 - Licence: GNU/LGPL
Originally aimed for 508 compliance, but not very successful
Matrix

Version: 1.2 - Licence: GNU/LGPL
Requires a fast computer, light version also included.
Matrixlight

Version: 1.2 - License: GNU/LGPL
Included with the Matrix archive.
NHS

Version: 1.1 - Licence: GNU/LGPL
A stylesheet by sdl of the Tiki Community conforming to the NHS colour schemes.
Purplemetal

Version: 1.3 - Licence: GNU/GPL
Theme borrowed from another CMS. Purple version. (Background image is missing from archive. Change body background color in stylesheet, as a workaround.)
RedGrey

Version: 1.3 - Licence: Unknown
A rip of the Fedora* themes
Redmetal

Version: 1.2 - Licence: GNU/GPL
Theme borrowed from another CMS.
Specialsauce
Version: 1.1 - Licence: GNU/LGPL
Black, Yellow and Grey
(This theme needs some updating to be used with current Tiki versions. There are major text-background contrast problems.)
Tarynsworld

Version: 1.2 - Licence: GNU/LGPL
This is the theme in action at TarynsWorld.
Underworld

Version: 1.2 - Licence: GNU/LGPL
Underworld theme, very dark colours
Veryorange

Version: 1.2 - Licence: GNU/LGPL
Orange version of moreneat
Zaksworld

Version: 1.3 - Licence: GNU/LGPL
This is the theme in action at Zaks site.
Ztheme

Version: 1.3 - Licence: GNU/LGPL
Simple theme, conservative colors. Designed for easy "readability" and use.