You can order it from https://www.trichview.com/order/
Adit Math Engine is a set of native VCL component for displaying and editing mathematic equations.
Web site: https://www.aditmath.com/
There are two versions of Adit Math Engine:
- a free basic version; it is included in TRichView;
- a commercial advanced version (that includes WYSIWYG equation editor, support of popular math formats, and more )
Currently, equations can be stored in documents only in RVF format. In other formats, they are exported as images. In future, I plan to implement loading and saving equations in RTF and DocX files (with commercial version of Adit Math Engine).