OpenSSH is a collection of command line tools to facilitate logins to remote computers within a reliable cryptographic framework. Highly portable and under very active development for over 18 years, it is the de-facto standard for SSH, SCP and SFTP operations from the terminal.
Ranked in these QuestionsQuestion Ranking
Pro Standard implementation that documentation for all other tools assumes you have installed already
A lot of other tools (e.g. git) are based on this for file transfer.
Pro The Reference SSH Client.
If you find samples or tutorials about SSH, they almost always refer to OpenSSH. It bascially defines what SSH is.
Pro One of the most trustworthy development teams on the web
The development team of OpenSSH is part of the OpenBSD ecosystem. Their implementation is basically today's technical reference for any SSH client.
Pro Available on virtually any platform
macOS. Windows. Core component on any Linux flavor.
Con No host list
Has no functions to manage huge numbers of hosts.
Con Command line tool
It can be difficult to use from a command line interface.