BackWPup

The plugin is not yet fully developed for production usage, but works fine.

Installation:

Unpack and upload it to the /wp-content/plugins/ directory.
Activate the plugin through the 'Plugins' menu in WordPress.

Features:

• Database Backup
• WordPress XML Export
• Optimize Database
• Check\Repair Database
• File Backup
• Multisite support only as network admin
• Backups in zip, tar, tar.gz, tar.bz2 format
• Send Log/Backup by Email
• Store backup to Folder
• Store backup to FTP Server
• Store backup to RackSpaceCloud
• Store backup to Amazon S3
• Store backup to Google Storage
• Store backup to Microsoft Azure (Blob)
• Store backup to Dropbox
• Store backup to SugarSync

What is new in this release:

• Fixed:
• var_export not working if output buffering active
• Bug in sending test emails on Backup with email
• Backup archives not deleted if archive name has spaces
• Bug in tar file name length detecting
• Bug in not displaying abort message
• Abort of S3 uploads from other running backups
• Changed:
• Maximum backup archive size is now 2GB (some filesystems do not support larger files, split the job if you need more)
• WordPress Export will now done by a own class
• Dropbox now uses oAuth 2 Protocol
• Dropbox change to TLS Protocol
• Logs have now a br tag on line end for better reading in emails
• Improved:
• Dropbox chipper list not on NSS cUrl backend
• Increased performance on Zip File generation massively
• Backup archives now deleted to if the archive format changed
• Archive tarring and its compression
• Loading of Swift Mailer
• Added:
• GreenQloud to S3 services
• Amazon Germany region to S3 and Glacier services

What is new in version 3.0.12:

• Added:
• Russian translation
• Simplified Chinese translation
• Fixed:
• German log string typo

What is new in version 3.0.7:

• Improved: Ajax calls if blog in maintenance mode
• Improved: Getting of DB_CHARSET
• Improved: FTP file deletion
• Improved: Dropbox authentication (If restrict to job settings page not work you can open the settings page manually again to authenticate)
• Fixed: No maintenance mode, if a maintenance mode already active
• Fixed: Archive file deletion
• Updated: AWS SDK to Version 2.2.1 (PHP 5.3.3+)

What is new in version 3.0.1:

• Jobs can now be started with an external link or per command line
• Backups can now be compressed with gz or bzip2
• All file names can now be adjusted
• MySQL dump supports now views
• Settings for access control per capability and role
• Save a list of installed Plugins
• Support for WP-CLI

What is new in version 2.1.17:

• Added auto-complete off to some input fields.
• Changed API domain for Google Storage.
• Updated AWS lib to 1.5.17.1.

What is new in version 2.1.15:

• Fixed FTP folder bug.
• Dropbox chunking will done in memory not in temp.

What is new in version 2.1.14:

• Removed calling home function.
• Fixed missing ' in mysql dump.
• Now lager than 150MB uploads to Dropbox with there Beta API.
• Fixed bug in progress updates.
• Fixed problem with ftp dir can not empty.

What is new in version 2.1.13:

• Tweaked Gstorage upload
• Fixed bug in xml file generation
• Changed base64 function to prevent false positive massages from scanners
• Removed executeable files from MS Azure SDK

What is new in version 2.1.12:

• Fixed problem with mb_string funktion on job start.
• Reduced needed memory for FTP upload.
• Updated Google Storage Url's.
• Updated AWS lib to 1.5.8.1.

Requirements:

• WordPress 3.2 or higher
• MySQL 5 or higher
• PHP 5.2.5 or higher