Favorite SIP clients for linux

What are your favorite SIP clients for linux?

Some well known options include Linphone, Ekiga, Zoiper. There’s also Jitsi though it seems they’ve grown into more than just a SIP client. Then there’s twinkle but it seems old.

Wikipedia lists are sometimes helpful: https://en.wikipedia.org/wiki/Comparison_of_VoIP_software

Any hidden gems not getting due attention?