Keys that have

ePASS FIDO2
Feitian’s ePASS Fido2 series provides a standards compliant U2F option for a low price.
ePASS FIDO2 Biometric
Feitian’s biometric options bring fingerprint authentication for additional security
GoTrust IdemKey
GoTrust’s IdemKey is the first FIDO2 Level 2 certified U2F token on the market.
HyperFIDO Pro Mini
Small and unassuming, good for a desktop with occasional travel.
HyperFIDO Titanium PRO
No-frills and durable, HyperSECU’s HyperFIDO Titanium Pro provides a basic option for keychains.
IdemCard
For those willing to do the legwork, a holdable option for wireless authentication.
Thetis FIDO2 Security key
Thetis’ line of FIDO2 U2F tokens are durable, inconspicuous, and simple.
This key is no longer recommended for use.
Titan Key (Gen1)
No longer supported, the first generation of Google’s Titan keys started the trend.
Titan Security Key (Gen3)
Google’s current generation of U2F tokens, the third generation continues the tradition.
TrustKey T110
TrustKey’s entry level token provides a large number of options for authentication but requires software for non-U2F features.
Yubico FIDO Security Key NFC
A cut-down Yubikey, the Security Key series provides a classic form with wide function.