What are some alternatives?
When comparing Azzul and Disk Explorer Professional, you can also consider the following products
Virtual Volumes View - VVV uses a relational database to store its data.
Wincatalog Light - WinCatalog Light provides basic cataloguing functionality:
abeMeda - abeMeda is a powerful and very fast disk cataloging tool, reading metadata like EXIF, IPTC, JPG, TIFF, MP3, AAC (iTunes)
Cathy - An extremly small, very fast and easy to use media cataloging tool.
DiskCatalogMaker - Simple, smart and fast disc management tool.
Camel Disc Catalog - Camel Disc Catalog is a DVD and CD Catalog that generates a computer database to keep track and find any disk in a snap