DOSBox is described as 'Emulator program which emulates an IBM PC compatible computer running a DOS operating system. Many IBM PC compatible graphics and sound cards are also emulated. This means that original DOS programs (including PC games) are provided with an environment in which they' and is a very popular DOS Emulator in the os & utilities category. There are more than 10 alternatives to DOSBox for a variety of platforms, including Windows, Linux, Mac, Web-based and Android apps. The best DOSBox alternative is DOSBox Staging, which is both free and Open Source. Other great apps like DOSBox are DOSBox-X, iDOS Emulator, DOSBox SVN Daum and D-Fend Reloaded.
It's based on DOSBox sources, but it's updated much more frequently.