Google Desktop

Google Desktop will offer full text search over your email, computer files, chats, and the web pages you've viewed. By making your computer searchable, it puts your information easily within your reach and frees you from having to manually organize your files, emails, and bookmarks. It introduces new ways to access relevant and timely information. When you view a web page in Internet Explorer, it caches or stores its content so that you can later look at that same version of the page, even if its live content has changed or you're offline. It organizes email search results into conversations, so that all email messages in the same thread are grouped into a single search result.