Resize disk partitions on a server

what software would you recommend "based on your experience" to resize disk partitions on a server.

In windows disk management will only shrink to the left, and expend is there is Unallocated space on the left. since its the partitions I need to expend is on the right side disk management will not work.

Its a server on a remote location so the sofware should work by installation on the OS not a booth based program.

I would prefer something free, but I can afford risk to the server. If paid should it be reasonable and if possible to use on more then one server. I don't need any other function then a one time resize on that server and use for future clients need.