MailWizz EMA uses a few external libraries/frameworks, 
for which i don't assume any credit, all credit/copyright belongs to their respective authors/owners.

The libraries/frameworks list MailWizz EMA use:

Yii Framework
    This is the backbone of the application, please visit http://www.yiiframework.com for more info.
    (Source code not modified at all)

QueryPath
    It is used for email template parsing
    Please see http://www.querypath.org for more details
    
Openwall PHPass
    It is used to hash the user / customer passwords
    Please see http://www.openwall.com/phpass/
    (Source code not modified at all)

Php Thumbnailer
    It is used for manipulating images.
    Please see http://phpthumb.gxdlabs.com/ for more details
    (Source code not modified at all)
    
Swift mailer
    It is used to deliver the emails
    Please see http://www.swiftmailer.org for more details
    Source code slightly changed: 
    - Changed the file /SwiftMailer/lib/classes/Swift/Mime/Headers/MailboxHeader.php 
      at line 347 and commented the body of the _assertValidAddress method.

PHPMailer (since 1.3.4.2)
    It is used to deliver the emails
    Please see https://github.com/PHPMailer/PHPMailer for more details
    (Source code not modified at all)
          
Urify
    It is used to create nice slugs
    Please see https://github.com/jbroadway/urlify for more details
    (Source code not modified at all)
    
Bounce handler
    It is used to process bounced emails
    Please see https://github.com/twisted1919/bounce-handler for more details
    (Source code modified)
    
Twitter Bootstrap
    The CSS framework for the application
    Please see http://www.getbootstrap.com/ for more details
    (Source code not modified at all)
    
jQuery
    The JS framework for the application
    Please see http://www.jquery.com for more details
    (Source code not modified at all)
    
Datetime picker
    Used in customer area
    Please see https://github.com/smalot/bootstrap-datetimepicker for more details
    (Source code not modified at all)

Date picker
    Used in customer and frontend area
    Please see https://github.com/eternicode/bootstrap-datepicker for more details
    (Source code not modified at all)
    
Color picker
    Used in backend, customer and frontend area
    Please see https://github.com/itsjavi/bootstrap-colorpicker/ for more details
    (Source code not modified at all)
        
Html2canvas
    It is used to take screenshots from templates
    Please see http://html2canvas.hertzen.com for more details
    (Source code not modified at all)


Codeigniter Framework
    The CI_Security class is incorporated to sanitize the global variables.
    Please see http://ellislab.com/codeigniter/ for more details
    (Small changes to the source code with proper notes as required by Codeigniter license)
    
CKEDITOR
    It is used to edit the html templates/articles/etc
    Please see http://www.ckeditor.com/ for more details
    Extra plugins used:
        codemirror for syntax highlighting (please see http://codemirror.net/ for more details)
    (Source code not modified at all)
    
ElFinder (since 1.2)
    CKeditor File manager
    Please see https://github.com/Studio-42/elFinder
    (Source code not modified at all)
    
Mobile-Detect (since 1.2)
    A small php library to detect if the user agent comes from mobile, tablet or desktop
    Please see https://github.com/serbanghita/Mobile-Detect
    (Source code not modified at all)
    
GMaps.js (since 1.2)
    A small js library to embed google maps
    Please see http://hpneo.github.com/gmaps/
    (Source code not modified at all)
    
Html2Text (since 1.3.1)
    A library that will transform html email to plain text
    Please see https://github.com/mtibben/html2text/
    (Source code modified pretty much)

Invoicr (since 1.3.4.7)
    A library to generate PDF files
    Please see http://codecanyon.net/item/invoicr-php-class-for-beautiful-invoices/8829220
    (Source code modified a lot)

Cron Expressions (since 1.3.5.3)
    https://github.com/mtdowling/cron-expression
    (Source code not modified at all)

JQCron (since 1.3.5.3)
    https://github.com/arnapou/jqcron
    (Source code not modified at all)
    
Flexslider (since 1.3.6.3)
    https://www.woothemes.com/flexslider/
    (Source code not modified at all)
    
Country flags (since 1.4.5)
    https://github.com/hjnilsson/country-flags
    
jQuery Pulsate (since 1.5.1)
    https://kilianvalkhof.com/jquerypulsate/
    
Strftime (since 1.5.2)
    http://hacks.bluesmoon.info/strftime/index.html