CMGroupBuying is a Joomla! component which helps you add social buying / group buying feature to your Joomla! website.
Current version's main features (version 2.8.2):
Customers can buy for deals, print free coupons or get free coupon code
Menu items lists of deals and free coupons.
Menu items for shopping cart, user's orders and coupons, RSS feeds
Partner (merchant) area for checking and updating coupon status
+1 button for Google+, share deal via Twitter and Facebook
Each deal/free coupon has its own background image
Insert deal into Joomla! article, ability to design your own template
Side module for listing of deals
Search for deals
Integration with ACYMailing component for a mailing subscription system
Integration with sh404sef for friendly URL
Integration with Joom!Fish and Falang for multilingual
Provide customizable XML structure to connect with deal aggregators
Deal map/Category browsing: use Google Maps to browse for deals
Multi-option for deal: every deal can have many options (prices)
AlphaUserPoints integration: earn points by referring deals, use points to buy deals
Support Alipay, Authorize.net's SIM, Authorize.net's AIM, Gold (Cardcom), Cash, DineroMail, eWAY's Shared Payments, eWAY's Direct Payments, Faturah, Fortumo (only support Mobile Payments / Premium SMS API), iDEAL (via Mollie), iPay88, Klarna, MercadoPago, MOLPay, PagSeguro, Payfast, Paypal Web Payment Standard, Paypal Pro's Direct Payments, PayU, Payza, PesaPal, Setcom, SystemPay, 2Checkout, VivaPayments
JomSocial integration: pre-fill JomSocial profile when checking out, buy deal with JomSocial point, get bonus JomSocial point for referral, post an activity on user's wall after buying deal
Integration with Community Builder user profile
Free developing new payment gateway
Merchant can submit his deals and free coupons by himself
Geotargeting (using IP database from MaxMind, IPInfoDB)
Joomla Content plug-ins are supported in deal/free coupon detail page
Advance payment: buyer only needs to pay to group buying site a small amount of deal price, the rest will be paid to merchant
Ability to buy without registration
Ability to buy multi deals at the same time
Responsive template and layout (mobile friendly)
Integration with K2, Akeeba Subscription component
Discus comment integration
Coupon in HTML and PDF format
Control layout, email notification and other settings
Design coupon by drag-and-drop.
Compose mail content
Manage categories, locations, partners, deals, orders, coupons
Report for deal and partner, export report to Microsoft Excel file
Integration with ACYMailing's tag system and auto-newsletter to send daily deal to subscribers
Administrators preview the deals, free coupons from merchants before set them published
Administrators can modify buyer/coupon receiver info.
Resend coupon to receiver.