I believe the "
www.LogMeIn.com" is the best.
Because, it has amazing and number of features included in it. Which enables you to work remotely without getting disconnected and with the few fabulous features in it. They have three ranges
1) Remote Access (LogMeIn Pro)
2) Remote Support (LogMeIn Rescue)
3) Remote management (LogMeIn IT Reach)
Advantages of LogMeIn Pro
" Remote Sound Hear email notifications, check web based voice mail or listen to music and podcasts from your host computer
" Drag & Drop Seamlessly transfer files and folders between connected PCs
" Sharing Share files or photos instantly with others, even those too large for email
" Remote Printing Automatically print files from your remote PC to your local printer
" Direct Connect Save time and clicks by going directly from the My Computer's page into a remote control or file transfer session
" Mini Meeting Invite a colleague or friend to your PC for an online meeting; view only or full control
" File Transfer Move files quickly between PCs
" File Sync Synchronize files and folders on both PCs in seconds
" Drive Mapping Link your local drives to your target PC
" Quick Clips Short format how to video clips on LogMeIn features and functions
Advantages of LogMeIn Rescue
"Take control of PCs, Macs and smartphones* in seconds
"Reinforce your brand, simplify support, & drive business with unique Calling Card
"Configure and scale for any size support organization
"Full product available in seven languages; customer applet available in 22 languages
It Supports Windows, MAC, Windows Mobile, Symbian OS, BlackBerry, iPhone and etc.
dvantages of LogMeIn IT Reach
100% Hosted, Web-Based Solution
Manage your machines at any time from any Internet-enabled location - even from a Windows Mobile PDA.
Background Access and Diagnostic Toolkit
A robust diagnostic toolkit enables proactive problem resolution in the background without interrupting users; access an unattended machine at any time, from any Internet-enabled device.
Inventory Tracking & Reporting
Perform preventive maintenance with Inventory snapshots, reporting and alerts, generate detailed information so you can monitor and maintain system health.
Fast Remote Control
Patent pending point-to-point architecture delivers high-speed, full screen, reliable remote control sessions.
Windows Based Permission Security
'Snaps- in' to your existing security by using existing Windows authentication and user permissions, in addition to RSA SecurID support, compatibility with Active Directory, detailed logging, and 128 to 256-bit SSL.
Apart from it i have attached the pdf for the details of the features.