I have been using v4.0 on 7 x64 for some time. It works perfectly.
Now v4.1 is available for home use completely free
:. Boot disc also.
Small, fast and effective - 32 and 64 bit compatible.
All the functions you are likely to need , including partition undelete and partition/disk copy as well as move/resize, etc.
Supported filesystems FAT and NTFS - so only for Windows users.
Free Download Partition Wizard
Competition is really hotting up in the disk management area.