I don't know if people will agree with exodus and coinomi both multi currency wallet, but it's worth mentioning. Also blockstream green wallet.
Another one that I know is atomic wallet but it is also close source. I can not use close source wallet because people do not know if close source wallets have malware, it is good to use open source wallet.
I do not know what the OP want to use it for, may be he will need all the wallets, both open source and close source, but in his research writing he has to include the disadvantages of close source, especially that people do not know if the wallet is having malware or not.
Thanks, I do have those in the list, and in contact with the devs.
Can't really blame them. Many of these projects were previously open source. Then bad actors started copying the code verbatim, slapping on a different logo and name, or worse, pretending to be the real app and then stealing users funds.
A security model that some now embrace is "security through obscurity".
To each his own, I guess.