Apps similar to Calendar Sync + include EteSync, which is open source with a free version. Other options are Outlook Google Calendar Sync, Keeper, Google Calendar Sync and gSyncit. You can choose from more than 10 Calendar Apps like Calendar Sync + for Windows, Android, iPhone, iPad and self-hosting.
Secure, end-to-end encrypted, and privacy respecting sync for your contacts, calendars and tasks. Everything is encrypted on the client-side and all the code (client and server) is open source.
United Kingdom
Offers calendar synchronisation between Outlook and Google, including attendees and reminders. Completely free, no install necessary, works behind web proxies and actively developed.
United Kingdom
Keeper is an open-source calendar syncing tool that can be used to sync the blocks of time marked as "busy" on your personal, work, business and school calendars.
Canada
Google Calendar Sync allows you to sync events between Google Calendar and Microsoft Outlook Calendar. Youll be able to determine the direction of information flow, as well as the sync frequency. Staying on top of your Google Calendar and Microsoft Outlook Calendar events has...
gSyncit™ is a Microsoft Outlook add-in that allows for the synchronization of Outlook calendars, contacts, notes, and tasks with your Google account.
United States
AkrutoSync automatically and privately syncs Outlook PC contacts, calendar, tasks and notes direct with any Android, Windows phone, iPhone or iPad. Keeps information out of cloud.
United States
OggSync’s mission is to keep mobile users in sync with the scheduling demands of a busy lifestyle, keeping all calendars in one manageable view! Whether it is a users’ Google or Outlook calendar, OggSync syncs to a users mobile phone quickly and automatically, allowing users see...
Outlook4Gmail is a must-have Outlook add-in that provides easy synchronization of your Outlook and Gmail accounts (contacts and appointments).
CB Exchange Server Sync enables live, secure synchronization of data among multiple Exchange servers and accounts. The synchronization can be one-way, or bi-directional. Simply choose 2 or more accounts you want to synchronize, rest is done for you.
Austria
EU
With gSyncing tool you can sync Google calendar, contacts and tasks with Outlook and other files from your different devices. Great app for Gmail and Outlook synchronization.
GermanyEU
A solution for syncing Outlook Calendars, Contacts and Tasks with Apple iPhone, Android phones as well iCloud, Gmail Contacts and Tasks, Google Calendars, Microsoft Exchange, Office 365 Calendar, Contacts & Tasks.
United States
ECO enables Outlook to sync with CardDAV & CalDAV services like iCloud, Google, Outlook.com, 163, QQ, MIUI, Toodledo,and Yahoo!, Mac OS X server, Baikal, EVO, Zimbra, SOGo, Synology, Kolab, DaviCAL, MailEnable, Kerio Connect, and ownCloud.
United Kingdom
