Outlook.com
Description: Outlook.com is a free personal email service from Microsoft that offers a simple, ad-supported inbox experience with 15GB of storage. It provides access to Outlook on the web and integrates with Microsoft apps like Word, Excel, and Calendar.
Type: software
Zimbra Collaboration Suite
Description: Zimbra Collaboration Suite is an open source email and collaboration platform. It includes email, contacts, calendar, document management, and other collaboration tools. Zimbra is designed for enterprises and service providers.
Type: software
Pricing: Open Source