Organizing basketball, football, or any other sport with friends? Planning party, inviting guests, going out, for trips or holidays? Run organization having regular meetings and events? Save time using convenient and simple free online planner OrganizeOK designated for group activity and repeating events. Sign in using your email, or existing Facebook, Google or Yahoo! accounts. Create events in three steps: 1 Write event details. 2 Add participants' emails. 3 Select when and to whom to send emails with invitations or reminders. Up to 3 different emails can be set. Participants register for participation in event online directly from emails. Invited participants can always see full event information and write comments for event. Additionally it features events calendar, events search and contact import from Google or Yahoo!. The tool works fine on mobile devices.