Natlink has been kept "alive" for about 20 years by now. Several other packages are built on top of Natlink, like Unimacro, Voicecode (now obsolete) and Dragonfly. And on top of Dragonfly, many people use Caster and Mathfly.
With the release of Dragon 15, now already several years ago, a few essential changes had to be made in the C++ interface, natlink.pyd, that connects Dragon with the python programs.
Starting in 2020, the support for python 2 has stopped, and "we" are transforming the code to python 3, which is now well under way.
Also, more collaboration is now taking place within the Dictation Toolbox, and Natlink and Unimacro are now two of the repositories in this Toolbox.
Unimacro was developed by Quintijn Hoogenboom and Bart Jan van Os in the early 2000's. The target was mostly global grammars, with specific "actions" in specific programs. Also introspections, translations into other languages, mainly Dutch, and a trace facility are built in.
Vocola, a Voice Command Language, was developed by Rick Mohr around 2009, and Mark Lillibridge from then on supports the Dragon version on Windows. (Vocola also works with Windows Speech Recognition.) Vocola is an easy tool to make your own voice commands. Support for all languages that are known by Dragon. More elaborate extensions are possible. See vocola.net.
Many people work on this software, most on Dragonfly/Caster, but also on developments that do not need Dragon and Natlink (any more). See the chat channels on gitter, and the repositories on github.