Now let's review some of the most beautiful themes for Redmine (in my personal opinion).
Remember, however, that by selecting a theme, you actually choose which existing site you want your Redmine to look like. Public themes, especially nice-looking ones, are used widely and often. So, if you can afford it, order a unique theme for your website.
The Basecamp theme was created by Peter Theill. It is a port of 37signals' Basecamp theme for Redmine:
This theme can be downloaded from https://github.com/theill/redmine-basecamp-theme.
This theme was originally authored by Eero Louhenperä from Modula.
Later, the maintenance of this theme was taken over by Steven Jones from Computer minds, so now it can be found at https://github.com/computerminds/modula-mojito. Unfortunately, it has not been updated for a long time (3 years).
This theme was created by Kirill Bezrukov. It is based on Ronin's theme (a time tracking application).
This theme can be downloaded from http://www.redminecrm.com/pages/a1-theme.
This theme was also created by Kirill Bezrukov. It is based on 37signals' Highrise CRM theme.
This one can be downloaded from http://www.redminecrm.com/pages/highrise-theme.