PROCount theme is very minimalistic and lightweight. It includes a customizable Countdown Clock and MailChimp plugins. The theme also comes with a LESS Stylesheet file that you can use to customize the page however you would like.
Countdown Clock - Animated LIVE Countdown that serves to count down in seconds, minutes, hours and days to any specific date.
MailChimp Integration - Seamlessly integrated with MailChimp, allowing you to pool email addresses within seconds.
Responsive Design - Crafted to provide easy reading and navigation with minimal resizing, panning, and scrolling across a wide range of devices.
LESS Stylesheet - LESS extends CSS with dynamic behavior such as variables, mixins, operations and functions.
Check it out at ThemeWizz