new file: img/misc/email.png

new file:   img/provider/etesync.png
	modified:   index.html
added calendar and contacts sync section

index.html

@@ -2039,6 +2039,82 @@
 			<li><a href="https://www.youtube.com/watch?v=yzGzB-yYKcc">Edward Snowden on Passwords - YouTube</a></li>
 		</ul>
 
+<a class="anchor" name="calendar_contacts"></a>
+		<div class="page-header">
+			<h1><a href="#calendar_contacts" class="titleanchor"><span class="glyphicon glyphicon-link"></span></a> Calendar and Contacts Sync</h1>
+		</div>
+		<div class="alert alert-warning" role="alert">
+			<strong>If you are currently using a calendar and contacts synchronization service like Google Sync or iCloud you should pick an alternative here.</strong>
+		</div>
+		<div class="row">
+			<div class="col-sm-4">
+				<div class="panel panel-success">
+					<div class="panel-heading">
+						<h3 class="panel-title">Nextcloud</h3>
+					</div>
+					<div class="panel-body">
+						<p><img src="img/provider/Nextcloud.png" alt="Nextcloud" align="right" style="margin-left:5px;">NextCloud is a suite of client-server software for creating and using file hosting services. This includes calendar sync via CalDAV and contacts sync via CardDAV. Nextcloud is free and open-source, and thereby allowing anyone to install and operate it without charge on a private server.
+						</p>
+						<p>
+							<a href="https://nextcloud.com/">
+								<button type="button" class="btn btn-success">Website: nextcloud.com</button>
+							</a>
+						</p>
+						<p>Client OS: Windows, Mac, Linux, BSD, Unix, iOS, Android, Fire OS. Server: Linux.</p>
+					</div>
+				</div>
+			</div>
+
+			<div class="col-sm-4">
+				<div class="panel panel-info">
+					<div class="panel-heading">
+						<h3 class="panel-title">Email Providers</h3>
+					</div>
+					<div class="panel-body">
+						<p><img src="img/misc/email.png" alt="Email" align="right" style="margin-left:5px;">Many email providers also offer calendar and contacts sync services. Refer to the <a href="#email">Email Providers section</a> to choose an email provider and check if they also offer calendar and contacts sync.</p>
+						<p>
+							<a href="#email">
+								<button type="button" class="btn btn-info">Website: Email Providers section</button>
+							</a>
+						</p>
+						<p>OS: depends on email provider.</p>
+					</div>
+				</div>
+			</div>
+
+
+			<div class="col-sm-4">
+				<div class="panel panel-warning">
+					<div class="panel-heading">
+						<h3 class="panel-title">EteSync</h3>
+					</div>
+					<div class="panel-body">
+						<p><img src="img/provider/etesync.png" alt="EteSync" align="right" style="margin-left:5px;">EteSync is a secure, End-to-End encrypted and journaled personal information (e.g. contacts and calendar) cloud synchronization and backup for Android. It costs $14 per year to use, or you can host the server yourself for free.</p>
+						<p>
+							<a href="https://www.etesync.com/">
+								<button type="button" class="btn btn-warning">Website: etesync.com</button>
+							</a>
+						</p>
+						<p>OS: Android.</p>
+					</div>
+				</div>
+			</div>
+		</div>
+		<h3>Worth Mentioning</h3>
+		<ul>
+			<li>
+				<a href="https://fruux.com/">fruux</a> - a unified contacts/calendaring system that works across platforms and devices.
+			</li>
+
+			<li>
+				<a href="https://signal.org/blog/flock/">Flock</a> - a discontinued calendar and contacts sync service by Open Whisper Systems. Despite being shut down the <a href="https://github.com/signalapp/Flock">source code</a> is still available on GitHub.
+			</li>
+
+			<li>
+				<a href="#cloud">cloud backups</a> - consider regularly exporting your calendar and contacts and backing them up on a separate storage drive or uploading them to cloud storage (ideally after <a href="#encrypt">encrypting</a> them).
+			</li>
+		</ul>
+
 
 		<!-- Key disclosure law -->
 		<a class="anchor" name="kdl"></a>