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MailChimp - MailChimp is the best way to design, send, and share email newsletters.
The PM Interview - Practice PM Interview Questions (w/ timer).
BizConnector - BizConnector offers marketing and workflow automation solutions to small businesses.
Pramp for Product Managers - Practice product management mock interviews with other PMs
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
Product Management Exercises - A repository of product manager job interview exercises