- mwscript: T146285: Switch mwscript from Zend PHP5 to default php alternative (e.g. HHVM or PHP7), used to be blocked by T145819, but that was fixed by Tim.
- wikidatadumps-shared.sh: T117534: DCAT-AP: XML produces invalid output with HHVM
- mwrepl: uses HHVM. https://wikitech.wikimedia.org/wiki/Debugging_in_production (Suggested by stas)
- wikitech (silver): T98813: Move wikitech (silver) to HHVM
- ...
See also:
- A list that Tim Starling put together at T172165#3758081.
- Tracking task for phasing out Zend PHP 5 in production (use PHP7 or HHVM): T172165: Require either PHP 7.0+ or HHVM in MW 1.31