The best place to start if you need help with a specific product is to contact the developer. All WHMCS Marketplace developers have both a website and support URL listed.
Modern and fully responsive WHMCS email template, containing 3 different styles.
Lara is a WHMCS Admin theme, using the open source AdminLTE package.
Fully responsive WHMCS client area theme offering the choice of different styles and layouts for the ultimate user experience.
A modern and fully responsive control panel style client area theme for WHMCS.
Christos Teriakis @ChrisTERiS
Never had good opinion for WHMCS Themes not because there are no good themes but because the most of them are just HTML templates and the actual WHMCS theme was just a matching header and footer. Digit changes my mind. Is a 100% WHMCS template, with nice dark color combination. 99% you'll not need support as everything is explaining well in the documentation, but it you need it, is fast and high level. I highly recommend it.