Outlook CalDav Synchronizer, Syndesis, Outlook4Gmail, GO Contact Sync Mod, Sync2, Contacts Sync, Sync2 Cloud, Outlook Google Calendar Sync, WebDAV Collaborator for Outlook, AkrutoSync, Google Sync, Calendar Sync +, SyncThemCalendars, EVO Collaborator for Outlook, OggSync, NuevaSync, ProperSync for Microsoft Outlook, TopSync, iCal4OL, CB Exchange Server Sync, Wunderlist for Outlook, gSyncing, VCOrganizer, Soocial are some alternatives to GSyncit.