6 fabulous and free replacements for Microsoft Outlook

As we’ve said before, proprietary software is pricey. Following our list of free and cheap office suites, we now turn to email clients that don’t cost a penny.

1) Mozilla Thunderbird

Credit: Mozilla

Platforms: Windows, OS X and Linux

• Tabbed windows
• Integration with messaging clients
• Junk mail filter
• Address book
• Supports privacy through Do Not Track
• Protects against phishing
• Add-on library

2) SeaMonkey

Credit: SeaMonkey

Platforms: Windows, OS X and Linux

• Integrated mail client, web browser and HTML editor
• Tabbed windows
• Sync across devices
• Session restoration
• Themes
• Open-source
• Junk mail filter
• Multiple accounts

3) Citadel

Credit: Citadel

Platforms: Linux and Unix

• Open-source
• Group calendar
• Instant messaging
• Content management with wikis and blogs
• Multiple domain support
• RSS aggregation