the sz development
Collection of free software for creating PDF files, downloading MP3 files, and more.
the sz development offers a collection of free desktop utilities for Windows and macOS, covering PDF creation, network monitoring, device information, protocol viewers, system monitoring, and development tools. The software is free to download, with optional donations to support development.
The product line includes Doro, a PDF printer that creates colored PDF files from any Windows application with optional PDF/A compliance and 128-bit password protection, available on Windows and macOS. Other utilities include PortScan for finding active network devices, York for network traffic tracing, Homedale for WLAN monitoring, and various protocol viewers for Modbus, BACnet, EtherNet/IP, and HART. Development tools include Redwood for extracting resources from Windows PE files and SpyEx for inspecting Windows messages. The utilities are available for a wide range of Windows versions, with some also supporting macOS.
The software is intended for Windows and macOS users needing standalone desktop utilities for office, network, system monitoring, and development tasks. All software is free to download, with optional donations accepted through PayPal or Stripe.
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