Disk partitioning.

Want to partition my HD. Wondering which software to use. Any recommendation?
And i want to partition to drive a: if possible.

And here are a few that I found from Wikipedia.
* Acronis Disk Director Suite
* Apple Disk Utility
* BeOS Partition Manager and Boot Manager
* Disk Doctors Partition Recovery[3]
* Microsoft Logical Disk Manager or Disk Management Console (diskmgmt.msc), part of Windows 2000, Windows XP and Windows Vista
* Microsoft diskpart
* Paragon Partition Manager[2]
* Solaris format utility
* Symantec PartitionMagic and ServerMagic
* TeraByte Unlimited's BootIt NG