Is there a user-friendly way to manage .deb applications in Ubuntu 25.04?

Ubuntu still supports GUI options like 'Gnome Software' or 'KDE Discover' which can handle .deb files. They might not be as robust as Synaptic, but they allow for a more visual experience. However, it's a bummer that the default Software Center is quite limited and doesn't support uninstalling .deb packages easily.

If you're really into having a graphical option, you can try setting 'Discover' as the default for .deb files. Double-clicking on a .deb should then open it with Discover, where an install button is available. Just keep in mind, managing updates or uninstalls might still be a bit of a hassle.

Just a heads up, Canonical hasn't prioritized good management of .deb apps in their Software Center. If you're after a smoother experience, you'll likely need to install another package manager like 'Synaptic' or 'Gnome Software'. It can feel like they’re steering users towards using Snaps instead.

In the App Center, you can definitely install .deb applications, but you'll have to search for them. 'Gdebi' is another app that lets you double-click .deb files for installation. It's pretty straightforward, but removing them will still require some terminal magic.

You might want to check out 'Synaptic', which is a graphical package manager. It's been a popular choice for managing software in Debian-based systems, including Ubuntu. Though it might not come pre-installed in Ubuntu 25.04, you can easily grab it from the official repositories.