Examples of some useful apps
send notification in chat window in real time when something happens
remind someone to do something later
update channel topic according to some schedule e.g. with current support person
show headline for a ticket when its number appears in a discussion
show a title/description/image for an URL mentioned in a discussion
offer to invite someone to a channel when they are mentioned in a discussion
Sure, none of this is a "killer app". Most are useful, though.
Biting the hand that feeds IT
