Makr.io is a platform that features a wide range of AI-created web applications. These applications help users perform diverse tasks such as converting SVG files to PNG, previewing HTML emails, reading RSS feeds, checking DMARC records, and analyzing email headers. Additionally, the platform offers tools for testing email subject lines, browsing inspirational quotes, learning about countries, selecting colors, making book recommendations, using a Pomodoro timer, planning agendas, exploring tech news, searching GitHub repos, and creating event countdowns.