Simplify your inbox when you turn it into a conversation with Spike. Say goodbye to clumsy headers, signatures, and excess clutter when you make your email work more like an instant messenger. Spike makes communication flow like natural conversations and consolidates threads intuitively. And best of all, Spike is free to use on any device whether on your Mac, PC, iOS, and Android devices in any web browsers. Sign up for Spike for free, and check out their other collaboration tools such as calendars, file management, advanced search, and various premium features.