Flow (Structured Discussions) – Parsoid provides a wikitext editor for HTML discussions
PDF rendering – Parsoid provides the structured HTML input for conversions to LaTeX, PDF (both via PDF and phantomjs) and other offline formats
Mobile Content Service is working on using structured Parsoid HTML+RDFa as the input for both mobile web & apps, including the Android app.
The Content translation project is aiming to translate Parsoid HTML with the help of machine translation and data sources like Wikidata. Parsoid is used to get semantic HTML + RDFa from an article in another language, and to convert the translated HTML+RDFa back to wikitext for a new article.
Linter extension – This recently developed extension exposes Parsoid-identified wikitext markup errors to editors for fixup. As of March 2017, this extension is in the process of being rolled out to Wikimedia wikis.