Email marketing software refers to specialized tools and platforms designed to create, send, and manage email campaigns for marketing and communication purposes. These software solutions are used by businesses and organizations to streamline their email marketing efforts, engage with their audiences, and achieve their marketing goals.

1. Mailchimp: Mailchimp is a widely used email marketing platform known for its user-friendly interface, email templates, and marketing automation capabilities. It offers both free and paid plans.
2. Constant Contact: Constant Contact provides easy-to-use email marketing tools, including customizable templates, list management, and event marketing features. It’s often chosen by small businesses and nonprofits.
3. AWeber: AWeber offers email marketing and automation tools, along with split testing and analytics. It’s suitable for small to medium-sized businesses.
4. GetResponse: GetResponse offers email marketing, automation, landing page creation, and webinar hosting. It’s an all-in-one marketing platform email marketing software suitable for businesses of various sizes.
5. HubSpot: HubSpot’s marketing automation platform includes email marketing features, along with CRM integration, lead nurturing, and inbound marketing tools. It’s ideal for inbound marketing strategies.
6. ActiveCampaign: ActiveCampaign is known for its advanced automation and CRM features. It’s a powerful platform for creating highly personalized and automated email campaigns.
7. Campaign Monitor: Campaign Monitor offers customizable email templates, automation workflows, and analytics. It’s often chosen by agencies and larger businesses.
8. SendinBlue: SendinBlue provides email marketing, SMS marketing, and marketing automation. It’s known for its affordability and is suitable for cost-conscious businesses.
9. ConvertKit: ConvertKit is designed for bloggers, content creators, and online businesses, focusing on simplifying email marketing automation and segmentation.
10. Drip: Drip is an eCommerce-focused email marketing platform with advanced automation capabilities. It’s tailored to help online retailers create personalized customer journeys.
11. MailerLite: MailerLite is known for its simplicity and affordability. It offers email marketing and automation tools, making it suitable for small businesses and startups.
12. Benchmark Email: Benchmark Email provides email marketing and automation features, including responsive templates and list management. It’s a user-friendly option for businesses of all sizes.

Please keep in mind that the features, pricing, and capabilities of these email marketing software solutions may have evolved since my last update in September 2021. It’s essential to research and compare options, considering factors like your specific business needs, budget, and desired features, to choose the best email marketing software for your organization. Additionally, many of these platforms offer free trials or free plans with limited features, allowing you to explore them before making a commitment.