Microsoft offers a remote desktop client for connecting to Windows PC’s. With this application you can remotely login and use PC’s that are running Windows XP Pro, Windows 2000, or Windows Server editions — especially useful at the office if you need to fix a problem on a Windows PC. Also useful for web developers who need to see what their web pages look like on PC browsers. Of course, it requires a Windows PC.
Get it here: Remote Desktop.
CoRD

You can consider CoRD to be a nice replacement for Microsoft’s Remote Desktop. This application will enable you to take over the screens of Windows machines so your life is easier as a Mac guy in a Windows world. It’s’ a great tool for network administrators.
CoRD looks nice and has “sparkle integration, right mouse emulation, custom port connections, stored settings, error reporting, and more resolutions.”
Download:here
Zulu

Wikis are one among the cooler technnologies prevalent on the web today. Zulu brings the power of the wiki to your desktop. This app calls itself “the only cross-platform personal wiki”, and seems quite straightforward to learn and use. For those who are new to the idea, wikis let you create various pages within the same document, linking one page to the next through the use of hyperlinks, an idea which is very useful for comparing and cross-referencing your notes
Download:here
FolderShare
I know it creates fear in many of you to think of downloading a Microsoft product. That fear is justified. But FolderShare may be a diamond in the rough. FolderShare lets you “create a private peer-to-peer network that will help you to synchronize files across multiple devices and access or share files with colleagues and friends.” There is a 2GB maximum per file, but you can make unlimited file transfers.
FolderShare can work between Macs and PCs by making a free account and getting all satellites on that account. So, if you have files at work that you’d like to continue working on when you get home, this will help. Rather than burning it to a cd or putting it on a drive, you can drop it in the folder and when you get home it will be there waiting for you. (This is also a great way to share music with friends and family…but I didn’t say that.)
Download:here
TNEF

Here’s another one for readers who have to live in a Windows world. (You may also like DoubleCommand, WinShortcutter, Remote Desktop, and Konfabulator.)
Sometimes when Windows users send you an email attachment, instead of finding the PDF document or Excel spreadsheet, you may find you’ve received a file called “winmail.dat”. This means the file you intended to receive was encoded in TNEF format — Transport Neutral Encapsulation Format — an ironic name for a proprietary Microsoft technology that makes it a hassle to receive attachments from some Window users.
Josh Jacob’s app TNEF’s Enough takes away the hassle. If you ever receive a “winmail.dat” file from a Windows user, use this app to decode it and get the file you expected.
Download:here