Many existing bots and proposals could be ported that are delay-tolerant and need neither Internet access nor relaying everything between a large number of subscribers, such as:
- moderated forums (PixelSocial, DC-Confluence, DC-Community)
- multi-player games (Deltaland, others where a game master is needed such as Werewolf, Mafia, Amongus and Among-sus)
- webxdc gallery (xstore): share apps (and client side bots) with each other
- Public Bots index: send the contacts and description of all known bots, being able to update via gossip
- Group Editor Bot: shared notepad with resending
- FAQ Bot: pin posts and save a tag for each
- stalebot: invites users to a group and removes members whose last seen date is greater than 30 days
- Yozuk: programmer’s utilities
- mutual credit system
- database: store, index and keep updated a relatively large database to allow others to execute full text search on and browse from with less traffic, such as documentation, mirror of DC source code, animated stickers
- synchronize achievements across groups such as game high scores or certain calendar events
- karma & praise: maintain a per user counter that can be incremented by others
- moderation bot to kick based on bad words or big attachments
- scheduled delivery of messages: send later, remind later, reminders for recurrent events in calendar
- …
Many IRC and XMPP clients had hundreds of such client-side addon “scripts” in the 90s and these could also be ported.