http://cmsmart.net/magento-extensions/magento-recurring-payments-extension-by-apptha Recurring payment extension simplifies the job of offering products in a subscription basis in an eCommerce store. This Magento extension can be used for payments made via PayPal Express Checkout.

1. Magento Recurring Payments Extension by Apptha
Recurringpaymentextensionsimplifiesthe jobof offeringproductsinasubscriptionbasisinaneCommerce store.ThisMagentoextensioncan
be usedfor paymentsmade viaPayPal ExpressCheckout.
 General
o Supportsrecurringpaymentsmade onlyviaPayPal ExpressCheckout.
o Compatible withMagento1.9communityedition.
o Supports'Simple'and'Virtual'producttypes.
o Improvessalesbyprovidingmultiplepaymentperiodsinsteadof one-timepayment.
o Registeredcustomerscankeepatrack of theirsubscriptionsandpaymentsthroughtheir'RecurringProfile'
Back end

2. o Admincan provide multiplesubscriptionplans(daily,weeklyetc) forasingle product.
o Four subscriptiontypescanbe providednamely'Day','Week','Month','Year'.
o 'BillingPeriodPrice'optioncanbe usedto setthe price for a single billinginasubscriptionperiod
o 'BillingFrequency'canbe usedto setthe frequencyof paymentfora subscriptiontype.
o 'BillingCycle'canbe usedto setthe time of completionof abillingcycle.
o Startingdate of a subscriptioncaneitherbe setbythe customeror activatedfromthe date of purchase.
o Admincan eitherenableordisable the subscriptionoptionsforaproduct.
o Dedicateddashboardformaintainingrecurringprofiles.
o Accountsof customersusingrecurringpaymentoptioncanbe monitoredconveniently.
o Admincan getthe listof active andsuspendedprofilesfromthe dashboard.