Meeting scheduling package

[Am Stat]

Hi there,

I'd like to to create a meeting scheduling web app so users can send a private meeting invitation to other users, recipients can either accept or reject a meeting invite. Originator can edit or cancel the meeting after it was accepted, etc., some basic functions. 

I don't want to reinvent the wheel, any recommendations on django libraries or packages I can use?

Thanks very much in advance!

Leon