NEO Pro 3.0
NEO (Nelson Email Organizer) Pro 3.0 makes Microsoft's ubiquitous email client, <a href="http://reviews.zdnet.co.uk/software/productivity/0,39024195,39159066,00.htm">Outlook</a>, work the way you wish it did but without altering your message base. It's not intended to replace Outlook, but instead to offer more flexible views of your emails. Acting as a plug-in to Outlook, you can invoke it from an icon the taskbar, or allow it to start with Outlook. It works on the client side only, which makes it compatible with Exchange, although you do have to ensure that you keep the local store synchronised with the central server if NEO Pro is to work properly.