You can consider donating it to:
Also you can anchor containers in hisec space at obvious locations like stargates, stars, etc. and put a bunch of stuff in them and not have the items locked so people can take them.
To make sure you can post a list of the containers and their locations or which system they are in to r/Eve and these forums so people will look after them.
Even if you leave they will stay there for at least 29 days so people will have plenty of time to find them.
(Not that they can not be scanned down so must be at locations people can warp to without scanning.)