7z1900.exe - 7-Zip for 32-bit Windows
7z1900-x64.exe - 7-Zip for 64-bit Windows x64 (Intel 64 or AMD64)
7z1900-extra.7z - 7-Zip Extra: standalone console version, 7z DLL, Plugin for Far Manager
7z1900-src.7z - 7-Zip Source code
lzma1900.7z - LZMA SDK: (C, C++, C#, Java)
7z1900.msi - (alternative MSI installer) 7-Zip for 32-bit Windows
7z1900-x64.msi - (alternative MSI installer) 7-Zip for 64-bit Windows x64 (Intel 64 or AMD64)
7-ZipPortable_19.00_Rev_3.paf.exe - 7-Zip Portable