ADV Sales Report + Profit Reporting v3.0 [1.5.x] v156x
Demo – http://www.opencart.com/index.php?route=extension/extension/info&extension_id=4087

Admin Quick Edit Pro 2.1.4 oc1.5.6.x vQmod
Demo – http://www.opencart.com/index.php?route=extension/extension/info&extension_id=3805&filter_search=admin%20quick%20edit

Quick Order Status Updater 1.0.1
Demo – http://www.opencart.com/index.php?route=extension/extension/info&extension_id=17196

Opencart Nitro Pack 1.2.1
Demo – http://www.opencart.com/index.php?route=extension/extension/info&extension_id=12658

Opencart Social Login 2.3 2014-07-23-1
Demo – http://www.opencart.com/index.php?route=extension/extension/info&extension_id=16711

One Page Super Quick Checkout

Amazon Buy Together Discount / Combo Discount
Demo – http://www.opencart.com/index.php?route=extension/extension/info&extension_id=10998

Abandoned Cart Reminder v2.2
Demo – http://www.opencart.com/index.php?route=extension/extension/info&extension_id=17371

Alert when In Stock v1.2

Opencart Blog Pro v1.3.3.1
Demo – http://www.opencart.com/index.php?route=extension/extension/info&extension_id=10639

FAQ System V.1.8

iContact – multiple departments and auto-reply
Demo – http://www.opencart.com/index.php?route=extension/extension/info&extension_id=10077

Ajax Quick Checkout 4.2.3
Demo – http://www.opencart.com/index.php?route=extension/extension/info&extension_id=9132

Opencart Category and Product-Based Shipping v200.2
Demo – http://www.opencart.com/index.php?route=extension/extension/info&extension_id=2684