Is it still appropriate to send a thank you note after attending a party?

You did good by bringing a gift, nothing more is necessary... People throw parties to show their own gratitude, don't turn it into a competition - (follow me here) - you were invited, then brought a gift, then want to send a 'thank you'.... It can sometimes become competitive which is very appalling... Just leave it be.. You attended with a gift, your deed is done..

If you are determined to show gratitude regarding the party, a 'thank you' note is fine (gratitude is never an ugly thing btw, don't ever think it is, just be sure to walk a fine line between gratitude and out-shining) - just keep it simple, don't try to 'out-do' the hostess... Just write something like "The party was great, thanks for having me. Hope to do it again next year!".... Simple is best in situations like yours.

Is it still appropriate to send a thank you note after attending a party?

I brought flowers to the hostess. Do I need to send a post-party gift - or is a note enough? And is a note important in the first place?

Thanks

If you want to, I find that a kind of odd thing to do now a days.

A post party gift seems excessive, but gratitude is always appreciated.