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Efficient Calendar Free which designed for you to manage your time efficiently, is one of the best free desktop calendars. It owns fantastic interface styles and portable function. You can take your time wherever and whenever as you want. Let your brain works without any distraction if you keep all your things in order.

• To-Do List and Task Manager
• Network Edition Available
• Easy to Search and Find
• Recycle Bin
• Portable Edition Available
• Easy to Use
• Main Holidays Can Be Imported at Any Time
• Pro Edition Available

Latest Version: 5.50 Build 542
Price: Free
Requirements: Windows 10/8/7/XP/Vista, Android, iOS
Languages: English, Spanish, Ukrainian, Hungarian, Armenian, Norwegian, Swedish, Portuguese, Traditional Chinese, Croatian, Bulgarian, Polish, Japanese, German, Arabic, Russian, Simplified Chinese, Italian, Turkish, Danish, Czech, Dutch, Farsi, Lithuanian, Slovenian, French, Thai, Greek, Finnish, Korean, Indonesian

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"... It is possible to alter calendar formatting (e.g. first day of week), contacts layout, desktop notes font and color, among others. Efficient Man's Organizer uses low-to-moderate system resources, so it shouldn't burden overall performance. It includes help documentation for less experienced users and runs smoothly. For unlocking extra features such as data sharing, hierarchical subtasks and event customization, feel free to check out the full edition of Efficient Man's Organizer. Till then, the free version comes bundled with reliable features for any user who wants to better manage their tasks. There is also a portable counterpart available."

- Softpedia

"Cute and easy to use! Pros: Easy to download. Set up nicely to imput contact data. Has informed me correctly about upcoming appointments. I am finally organized! Cons: One weird quirk I don't like. It organizes according to the first name of contact rather than by last name. Can't find a way to correct it. Summary: It's free, it's cute and I like it!"

- Mysticmisha, May 2011