Newborn 
JS Private invitations for a group meal: each guest replies and chooses food from their own link, and the organiser gets one clear order for the venue. Firebase, free and open source.
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Newborn JS // readme
MealMuster
Reusable event meal ordering. Someone organising a meal sends each guest a private link, the guest says whether they are coming and chooses food for themselves and any guests they bring, and the organiser gets a clear order to hand the venue. MealMuster by DRMSITE. The name is provisional, and I have not checked its availability as a trademark.
Status: version 0.1.0, offered as a pre-release. It was built from a product brief (SPEC.md) for one real group meal, and the names, address and menu from that event are replaced here with made-up ones, because a venue’s menu is the venue’s to publish. The plan it was built to is in IMPLEMENTATION_PLAN.md.
Licence
MealMuster is free software under the GNU Affero General Public Licence, version 3 or (at your option) any later version, copyright DRMSITE LTD. I chose it, as for ParishMap, because MealMuster is a web service, and the AGPL keeps modified copies that are run over a network open to the people who use them. If you modify or deploy it, please keep the “MealMuster by DRMSITE”…