Current version's main features (version 2.8.2):

Front-end:

• 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
• Facebook comment
• 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

Back-end:

• 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.