UXmas - An advent calendar for UX folk
FindNiche - A free tool for AliExpress and Shopify. You can easily find niche products from your competitors, get latest insights of trending secrets and best-winning dropshipping products on Top Shopify stores and AliExpress drop shippers.
25DaysOf - A customizable advent calendar, for everyone
Pexda - Data-Driven Product Research that Creates First-Mover Advantages
24 Ways - An advent calendar for web geeks
AliInsider - Find Most Profitable Dropshipping Products in a Click! Analyze Competition, Check Saturation of Any Product, Find Top Suppliers & Target Markets.