vidma is a lightweight application that can help you handle VDI (Virtual Disk Image) files. Currently it can resize the images.
What's New in This Release: [ read full changelog ]
· Unallocated blocks of zeroes are handled now properly (important for shrinking dynamic images).
· Non-zero extra blocks are supported now.
· Upcoming image size change is shown before the resize operation, along with the required free space for the operation and free space that is available on the volume at this moment.