WP2LaTeX – Convert WordPerfect documents to LaTeX
This is a long established, supported, converter. A patch is available to use its code as an HTML to LaTeX convertor (see documentation link, below; this code is unrelated to the purpose-built HTML2LaTeX, also on CTAN).
|Free license not otherwise listed
Maybe you are interested in the following packages as well.
- easylatex: Faster and simpler writing of LaTeX documents
- txt2latex: Convert text by fixing special chars and quote marks
- tr2latex: Translate troff source to LaTeX
- tlg2latex: Prepare LaTeX from the Thesaurus Linguae Graecae