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Basecamp is a web-based project collaboration tool that allows groups of people to share files, meet deadlines, assign tasks, and centralize feedback.

Active Collab works great for a small team of IT professionals and freelancers, as well as independent teams within larger organisations.

The free Zimbra Desktop client allows you to meld the online and offline worlds – storing and synching your email, calendar, contacts, files and documents in the cloud, yet having them locally accessible when on the road. Zimbra Desktop aggregates information across accounts (Zimbra, Yahoo! Mail, Gmail, Hotmail, etc.) and social networks (Facebook, Digg, Twitter, etc.) to help make communicating & sharing information easier than ever.

5pm is a web based project management application with a smart customizable interface. Email integration, iCalendar and RSS feeds, Timeline view and Reports are just a few features to mention. Free trial (no credit card required) is available.

The easiest way to collaborate on projects and ideas. MOOVIA is an enjoyable and secure social environment to host your team`s projects, tasks, meetings, ideas, messages and documents. It's a social collaboration platform designed for teamwork that improves communication, productivity and engagement.

StrikeBase is an online work platform for collaboration and project management in one central place with tasks, time-tracking, web and desktop chat, file sharing with comments and more.

Aha! is cloud-based software to set your product strategy based on market dynamics. Track imperatives through releases and features.

A web-based project collaboration platform. Basic features: organize discussions, assign and track tasks, store files and notes. There is a huge Add-on store with useful teamwork tools.

My Renovation is a convenient tool to manage workers and processes on total renovation and housing improvements. You can manage the process of current and future works despite your experience. Key stages are already listed.

Planship is an easy and very efficient web-based project-management tool. They offer all functionalities for teams to handle complex projects, and Planship can also be used as a very efficient Helpdesk software. There is a fully functional free plan for multiple users.

Give your team continuous time for focused workWinio is an organized and flexible space for teams that combines documents, tasks, and discussions to empower transparent collaboration in a peaceful way.

Kefez - this is ease to use web software for managing projects, tasks and other daily activities via computer browser. It is built mainly for small and middle level companies and includes complete working environment for distributed team members.