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MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
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Automatic backups, patching, replication, and failover. Focus on your app, not your database.
Cloud SQL handles your database ops end to end, so you can focus on your app.
Simple Groupware is a complete open source enterprise application offering email, calendaring, contacts, tasks, document management with WebDAV, synchronization with cell phones and Outlook over SyncML, full-text search and many more.
This plugin enables Roundcube to access the addressbook of the user in a Kolab-Envoirenment.
So you can keep your addresses in Roundcube in sync with the address in your other (Kolab-enabled) PIM-clients (like Thunderbird, Outlook and so on).
Microsoft Exchange compatible server and client libraries
OpenChange is a portable Open Source implementation of Microsoft Exchange server and Exchange protocols. It provides a complete solution to interoperate with Microsoft Outlook clients or Microsoft Exchange servers.
OpenChange client-side library is used in existing messaging clients and is the solution in new projects to communicate natively with Microsoft Exchange and Exchange-compatible servers. OpenChange server is a transparent Microsoft Exchange server replacement using native Exchange protocols and does not require any plugin installation in Outlook.
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Just3Files is a PHP web photo gallery that simply let u view ur folders of photos with its corresponding EXIF description (with autorotation and resize) by just putting in 3 files on your home folder! Template-base (change of outlook), No DB involved.
The Zope Address Book is a simple and intiutive product for managing contacts. It's so intuitive that no documentation except about permissions is needed.
It will feature importing and exporting of contacts (first step is Outlook files).
This web service developped in Java provides WebForum services on the IMAP4/POP3 protocol : you don't need database, and common messaging tool like Netscape Messenger or Outlook permits to create/delete new forum and to moderate messages.
Eridu is a web based groupware package written in PHP that aims to provide all the functionality expected of a professional groupware package such as MS Outlook+Exchange or Lotus Notes+Domino.
Create a database of documents based on the WikiWikiWeb concept (http://c2.com/cgi/wiki). A mix between WikiWikiWeb, USENET, Outlook Public Folders, and a keyword-base file system. Useful as a repository for all records and discussions for a project.
exchange4linux is a production/stable server solution to store/exchange workgroup data on Linux in a style simular to Exchange. Main goal is to provide Outlook users a free and open server alternative on Linux. Please check also www.exchange4linux.org