Beeftext also seems to be a Autohotkey spinoff. They all support plain text only.
Beeftext has nothing
to do with AHK and is developed in C++. It does
support Formatted text (in HTML format). Lintalist
also supports formatted text via HTML, Markdown and RTF, and is
developed in AutoHotkey. (But the focus of Lintalist is more on search imho)