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Wekan is a free and open soure, web-based, kanban tool that can be self-hosted. With Wekan you can maintain personal todo lists, keep an itinerary for you next trip with your friends or collaborate with your team on large scale projects. The Kanban experience provided by Wekan makes it super easy to get a broad overview of your project and how you and your team can move it forward.

Habitica is a free habit-building and productivity app that treats your real life like a game. The application can help you reach your goals and achieve better health, productivity and happiness. Habitica is built around a strong social network that will motivate you and inspire as you receive rewards and punishments based on performance of your tasks. Over 4 million people use Habitica to improve their life one task at a time.

Things is the award-winning personal task manager that helps you achieve your goals. With the new version of Things the is packed with powerful new features and a from the ground-up re-designed interface. Things is avalible for all Apple devices be it macOS, iOS or watchOS.

WeChat connects a billion people with voice calls, video calls, photo sharing, chats and payments. The multi-purpose application is developed by the Chinese company Tencent and is and in China, it is described as "the app for everything". WeChat is primarily developed for the mobile consumer, but is also avalible on desktop and in the browser.

Skype is a telecommunications application that specialize in providing video chat and voice calls between computers, tablets, mobile devices and consoles. The software allows you to connect with friends and business colleges worldwide. Skype provides free online calls, messaging, affordable international calling to mobiles or landlines and Skype for Business for effective collaboration among teams.

WhatsApp is free messenger app for chat and voice over IP, owned and managed by Facebook. The application allow users to send text and voice messages, make voice and video calls and share images, media files and user locations with friends and family.