The best alternatives to Theme Cards are Levels Theme, Login Designer, and Web Page Design. If these 3 options don't work for you, we've listed a few more alternatives below.
Level-up your WordPress login with Login Designer — the easiest way to customize your login screen.Login Designer gives you the power to design and build an on-brand custom WordPress login page.
A Growing Collection of high-quality customizable Landing Pages by Web Page Design. High-quality, useful, responsive collections of landing pages can save you a ton of time. Anyone can download it with one click. Free for personal use.