LibLime's Koha is a web-based, open source integrated library system (ILS) that has also been used for virtual library systems (e.g. recreating historic libraries). LibLime Koha offers libraries circulation policies, patron management modules, parent-child relationship for patron records, club and service management features, in-depth "holds" support, single click batch import "undo" option, EzProxy compatibility, self-checkout interface and more.