Magento 1: 

Remarkety for Magento plugin latest version: 1.5.3.6 

Download link: https://s3.amazonaws.com/rm-static-files/plugins/magento-1/Remarkety_Mgconnector-latest.tgz

Recent Change Log:

1.5.3.6
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Added 4 internal events to modify data before it passed to the API:
rm_order_data_webhook
rm_order_data_sync
rm_customer_data_webhook
rm_customer_data_sync

1.5.3.5
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By default get parent product stock levels from the child (simple) products

1.5.3.1
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Added - Added new events - Category view, Search view, Cart update

Magento 2: 

Remarkety for M2 plugin latest version: 2.4.5

Download link: https://github.com/remarkety/mgconnector.git 

Recent Change Log: 

Two-way unsubscribe feature. When a customer unsubscribes from Remarkety's email 
he will be unsubscribed in Magento 2 so that the customer will be marked as 
unsubscribed there as well.

2.4.0 

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2.3.8 

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Bugfix - Cart recovery link should clone the quote instead of trying to reset it

2.3.7 

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Support HTTP basic authentication for first store connection

2.3.6 

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Integrate with AheadWorks Reward Points