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Total Commander - A Shareware file manager for Windows® 95/98/ME/NT/2000/XP/Vista/7, and Windows® 3.1.
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XYplorer - File Manager for Windows
Simple Ops - Simplify website performance and uptime monitoring with alerting, ssl check, chrome ux metrics, multi locations
Double Commander - Double Commander is a cross-platform open source file manager with two panels side by side.