EASEUS Partition Master Professional is an all-in-one drive partition solution and disk management utility. It allows you to extend partition, especially for system drive, settle low disk space problem, manage disk space easily. Free version also available.
GPT fdisk is a disk partitioning tool similar to Linux fdisk but used for modifying GUID Partition Table (GPT) disks. The related FixParts utility fixes some common problems on Master Boot Record (MBR) disks.