Remote Desktop Client Software

» Windows

Windows Server versions, Windows XP, and Vista Premium, Business, and Ultimate come with a bundled Remote Desktop client. For other Windows versions, you can download Microsoft's Remote Desktop client:
Microsoft Remote Desktop 5.1 Client [Windows 95, Windows 98 and 98 Second Edition, Windows Me, Windows NT 4.0, Windows 2000, Windows 2003] For Windows XP SP2, there is a Remote Desktop client upgrade to version 6.1, enabling additional functionality when connecting to Vista and Windows Server 2008 systems:
Microsoft Remote Desktop 6.1 Client [Windows XP SP2] Devolutions has created a powerful client that can manage multiple remote desktop connections. Its available free from their website:
Devolutions Remote Desktop Manager [Windows]

» Mac OS X

Microsoft has an OS X client for Remote Desktop:
Microsoft Remote Desktop Connection Client for Mac 2 [Mac OS X] There is also an open source native OS X client called CoRD has been developed by Craig Dooley and Dorian Johnson. You can get it from sourceforge:
CoRD Remote Desktop Client [Mac OS X]

» iPhone/iPod Touch

There are two remote desktop clients available for the iPhone or iPod Touch:

• WinAdmin – more feature complete and solid than WinRemote, but also more expensive at $11.99
  WinAdmin web site
  WinAdmin on iTunes Store
  
• WinRemote – a much cheaper alternative, at $1.99. It also has a free trial available.
  WinRemote web site
  WinRemote on iTunes Store
  

» Windows Mobile

Some Windows Mobile phones come with a Remote Desktop client, but many are deployed without the RDP client. Fortunately, some smart people over at pdaphonehome were able to extract the Windows Mobile 6 RDP client into an installer that works on WM5 and WM6. You can find it on their forums:
Windows Mobile 5/6 Remote Desktop Client

» Linux/Unix

Many remote desktop clients are available for Linux/Unix. The following are the major clients:

• rdesktop – a generic X Window System Linux/Unix remote desktop client. Most other clients are based of it in some way.
  rdesktop web site
  
• krdesktop – a KDE frontend for rdesktop
  krdesktop web site
  
• tsclient – a GNOME frontend for rdesktop
  tsclient web site
  

» Java

There are several cross platform Java remote desktop clients:

• jrdesktop
  jrdesktop web site
  
• properJavaRDP
  properJavaRDP web site