Network DeepScan is a powerful tool for searching shared NetBios and FTP resources over local area networks. It can scan over multiple IP subnets, filter and sort found resources by various criteria. Besides it you can search for any kinds of files in found resources. Also there is a special feature in the program - LAN Explorer. It allows you to browse found shared resources directly in program and not open many instances of Windows Explorer.
Version 2.5 build 1.1 adds an option 'Show thumbnails for folders' in Lan Explorer.