Which apps can I use for P2P?

Hello there, I'm curious about the different apps that are available for peer-to-peer (P2P) transactions in the cryptocurrency world. Can you suggest some of the most popular or reliable options that are currently out there? I'm specifically looking for platforms that facilitate direct transactions between individuals, without the need for intermediaries. Additionally, it would be great if you could share any insights on the security features, user experience, and fees associated with these apps. Thanks in advance for your help!