Google Adwords is a small extension which add required code to your shop template to track conversations.
Simple installation with the embbeded installer (OpenCart 2.x) or manual as VQMod (OpenCart 1.5.x)

Features
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*   Dynamic or static data for submission
*   Sale figure with or without delivery cost
*   2 Types of code possible (sale and register)
*   Basic statistic inside extension, enhanced in the Google Adwords Account

SmartSupp Chat is a convinient way to add a highly configurable Chat to your shop.
This module will also record user actions as "heatmap".
It has several pricing options, base option is free.

Features
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*    Selectable position for required javascript code
*    Integration of Google Analytics
*    Store chats locale (additonally to Smartsupp)
*    Local defintion of many settings
*    Hide chat in selected pages
*    Disable recording of user interactions of defined pages (e.g. at checkout)
*    Design, Position

facebook Store enables shop owners to create a shop at facebook just with a few mouse clicks.

Features
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*    Optional elements in the header section like language, currency, search, etc
*    Optional elements per product like description (text or meta), price, reviews, add to cart button
*    Optional footer section, if enabled chooseable which elements to display: info, service, extra, etc.
*    Layout per CSS
*    Chooseable colors
*    Automatic selection of language at facebook based on user language
*    Chooseable modules (e.g. featured, bestseller, etc.) and slideshows, banners

Display the official WhatsApp Icon at the bottom left corner.
Click on it will send the current shop-URL.
Note: icon will be only displayed on devices < 961 pixel (e.g. Smartphones & Tablets)