Any chat client that supports the XMPP (Jabber) chat protocol can be used to staff the service and answer chats. XMPP clients are available for Windows, Mac, Linux, iPad, iPhone, Android, and pretty much any mobile device you can think of. So which client to choose? Below is a list of guidelines along with some pros and cons. Have fun and experiment to find the best match.
Browser-based clients, of which the native LibraryH3lp webclient is one example
Often favored by operators only staffing chat for particular shifts.
Convenient, nothing to install. Runs in your favorite web browser.
IMPORTANT: When answering chats from a 3rd party chat client (not the LibraryH3lp webclient), you will need to follow the link sent at the beginning of the chat to do specialized things such as transfer, send files, and block.