I often use MiniTool's Partition Wizard for managing partitions on disks. Very effective tool, very easy to use.
Would be awesome to run in a portable environment as its an excellent utility.
https://www.partitionwizard.com/free-partition-manager.html
If there is already a portableapps partition manager point me at it 
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The provide already a portable version:
https://www.partitionwizard.com/partitionmagic/portable-partition-magic....
Would be nice to get it integrated into portableApps.