UFW is very simple to use and configure. It's available right in the Debian repositories, and it integrates well into a Debian system. The simplified controls and ability to easily start and stop your firewall make in an excellent option for desktops and small servers.
If you plan on doing any sort of Ruby development, RVM is a must. Even though Debian does have its own Ruby packages, they're bound to Debian's release schedules, making them an inflexible option for your projects. RVM is simple to get set up, and it allows a much greater decree of flexibility, no matter what sort of projects you're working on.
There are two very simple ways to create a Python virtual environment on Debian 10. They're very similar and offer nearly the same benefits. As an added bonus, you won't need to install anything outside of the default Debian repositories to use them.
Debian is one of the best Linux server distributions, and LAMP is one of the most common ways to host a website. Together, they make a perfect match. It's very simple to get LAMP up and running on Debian 10 using packages right out of the default repositories.
Samba allows you to share your files over a local network to computers running any operating system. Samba also makes it simple to control access to these shares using a single configuration file. On Debian, that configuration is mostly set up for you, making configuring a Samba server on Debian a smooth experience.
There are two basic ways to set up a static IP address on Debian 10. The simplest for desktops is through NetworkManager's graphical interface. For servers or systems without NetworkManager, you can use a configuration file too.
The Android development tools, ADB(Android Debug Tool) and Fastboot, allow you unprecedented access to your Android device. These tools are essential for developers, and they make it possible to root and flash custom ROMs. Since Google uses Debian, installing them is very simple.
VeraCrypt is the successor to TrueCrypt. It offers many of the same features and is fully backward compatible. VeraCrypt is fully cross platform and offers a convenient installer that you can use to get started on Debian 10.
There are plenty of reasons why you'd want to share files across computers on your network, and Debian makes a perfect file server, whether you're running it from a workstation, dedicated server, or even a Raspberry Pi. Since NFS functionality comes from the kernel, everything is fairly simple to set up and well integrated.
If you plan on gaming on Debian, you're going to want Lutris. It's taken the cumbersome process of installing and playing games with Wine and automated everything to a point that makes everything nearly as easy as on Windows. Lutris is available from the developers through a Debian repository, so all you need to do is add it to your system to get started.
Wine's Staging branch is miles ahead of standard Wine in terms of both performance and features. You can install the latest Staging releases on Debian just as easily as the default version and get the latest updates as soon as they're released.
Steam has made constant improvements since it came to Linux, and that's not slowing down. With the introduction of Steam Play and Proton, Steam's version of Wine, you can now play your favorite Windows games directly through your Linux Steam client. Even better, you don't need to install any outside repositories to do it.