It is also available on Linux. A major shortcoming of PuTTY is that it does not have integrated file transfers in the client itself. Instead, file transfers have to be done via the command line. This is too complicated for most users.
Tectia SSH has had them since 2000. It can be used with Linux OpenSSH. Supports both 32-bit and 64-bit Windows. An MSI installer has been available since 2016.
Both SSH2 and SSH1 protocols are supported. Note that use of SSH1 is not recommended for security reasons. Practically all devices support SSH2 these days. File transfers only using a separate command-line programs. No scripting support, but can be used together with WinSCP. It has good terminal emulation, good configurability, and good support for different cryptographic algorithms. The PuTTY terminal is pretty good and handles terminal emulation well.