Here are a list that someone has collated - http://www.dongleauth.info/dongles/ http://www.dongleauth.info/dongles/ The alternative to Yubikey that I am aware

Here are a list that someone has collated - http://www.dongleauth.info/dongles/ http://www.dongleauth.info/dongles/ The alternative to Yubikey that I am aware of is NitroKey, but can't say I am aware of how they match up, feature for feature