Linglingqi

Very fast, integrated client for Exchange mail, calendars, contacts and tasks. Rendering and formatting of rich text and HTML emails is very strong. Supports email conversation grouping, searches, flagging and basic filtering. Hyperlinks conveniently open into an in-app browser for a quick first glance. Calendar, tasks and contact features are a bit less refined, though. From my perspective, it's biggest strength, though, is the ability to deal with a Webmail and Forefront configuration no other app can handle. Stability is ok. User support is very responsive.