Graphical user interfaces for DOS were a dime-a-dozen back in the ’90s, but of course faded into irrelevance as time went on. But what if you still run DOS today, and want a maintained graphical shell instead of the rather limited DOS command line?
Costa is a small and lightweight application which runs on top of MS-DOS or compatible operating systems. It replaces the DOS-prompt with a clean, user-friendly interface – a so-called GUI (Graphical User Interface). Costa comes packed with a bunch of useful accessories and can be used with or without a mouse.
Developed by Jacob Palm, a Danish IT-professional and hobby developer, the first release of Costa came way back in 2004. Over the years – and through several releases – Costa has gradually evolved into what it is today, with new releases still coming out regularly as of 2025.
↫ Costa website
Costa comes bundled with a number of useful utilities, a few games, and useful features like a desktop with custom icons, virtual desktop support, a file selector, and much more. The latest release, version 1.8.0, was released in late 2024, and should run on just about any IBM PC-compatible, but a 386 is recommended. It’s been tested with a variety of DOS flavours, including FreeDOS ad DOSBox, so it should run pretty much anywhere.

No CGA. =(
I even tried on my HP 200LX. Sadly, no go.
But it looks really pretty.