This isn't a true sidebar version as most modules still go to the bottom but I thought of this while making the original version and liked it too. The themes are the same; only the layout is a bit different. I'd love testing and feedback. :)

What is this? Medallion (Left)/Evergreens by ninetydegrees

Image sources:
* Medallion: painting by William Trost Richards - the Met museum - public domain (http://www.metmuseum.org/art/collection/search/11910)
*Background: webtreats ETC - free for use in both personal and commercial projects, including web templates (http://webtreats.mysitemyway.com/terms-of-use/)
*Icons: The Noun Project - CC-BY-SA or public domain
*Dreamwidth logo - Dreamwidth wiki - I hope it can be used if the theme is in dw-nonfree.

Links:
*Style: https://www.dreamwidth.org/customize/advanced/layersource?id=826364&fmt=html
*Theme: https://www.dreamwidth.org/customize/advanced/layersource?id=826365&fmt=html
*Preview: http://www.dreamwidth.org/customize/preview_redirect?themeid=826365

Other themes:
*Concrete: http://www.dreamwidth.org/customize/preview_redirect?themeid=826419
*Flowers: http://www.dreamwidth.org/customize/preview_redirect?themeid=826421
*Rest: http://www.dreamwidth.org/customize/preview_redirect?themeid=826425
*Under the Sea: http://www.dreamwidth.org/customize/preview_redirect?themeid=826426

Improvements (13.03.2017):
*Clarify some options
*Simpler code for Menu
*Add DW logo in bottom left corner

Improvements (16.03.2017):
*Move admin icon & sticky icons before datetime
*Bigger subject icons