Package files

You probably want one of these. They include versions of all the PuTTY utilities (except the new and slightly experimental Windows pterm).

MSI (‘Windows Installer’)

64-bit x86: download here -   putty-64bit-0.77-installer.msi
64-bit Arm: download here -   putty-arm64-0.77-installer.msi
32-bit x86: download here -   putty-0.77-installer.msi
Unix source archive
.tar.gz:  download here - putty-0.77.tar.gz

Alternative binary files

The installer packages above will provide versions of all of these (except PuTTYtel and pterm), but you can download standalone binaries one by one if you prefer.

PuTTY.exe (the SSH and Telnet client itself)

64-bit x86:  putty.exe
64-bit Arm: putty.exe
32-bit x86: putty.exe