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ONLYOFFICE Desktop Editors is an open-source office suite that combines text, spreadsheet and presentation editors, distributed under AGPL license v3. You can download and use them for home, government, educational and commercial purposes without restrictions.Features:· One pack - three editors - multiple features - Create, view and edit text documents, spreadsheets and presentations of any size and complexity. Deal with multiple files within one and the same window thanks to the tab-based user interface.· Compatibility with MS Office and OpenDocument formats - Work with most popular formats: DOC, DOCX, ODT, RTF, TXT, PDF, HTML, EPUB, XPS, DjVu, XLS, XLSX, ODS, CSV, PPT, PPTX, ODP.· Quick access to broad collaborating capabilities - Connect to server and collaborate on documents with your team: co-edit in real time, review, comment and interact using chat.· Third party add-ons - Create templates, insert video from YouTube and do even more. Extend ONLYOFFICE functionality with integrated add-ons or create your own one.· Support for all popular platforms - Windows 10, 8.1, 8, 7, XP, 2003, Vista (both 32-bit and 64-bit), Debian, Ubuntu and derivatives, RPM-based Linux distribution, Mac OS 10.10 or higher.· Updates and technical support - Free regular updates. Fast and professional assistance for all technical and functional issues via Forum. »

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

Mantis Bug Tracker is a free and open source, web-based bug tracking system. It is written in the PHP scripting language and works with MySQL, MS SQL, and PostgreSQL databases and a webserver. MantisBT can be installed on Windows, Linux, Mac OS, OS/2, and others. Almost any web browser should be able to function as a client. Moreover MantisHub is available as commercial hosted solution of MantisBT.

Open source Trello-like kanban board. Based on Restya platform.

A Kanban-inspired app for keeping track of things that need to get done.

Quire is a new-generation collaborative task management tool for organizing tasks in a tree-like structure wrapped in simple and user-friendly UI.

Tracker is a story-based project planning tool from Pivotal Labs that allows teams to collaborate and react to real-world changes instantly. Its based on agile software methods, but can be used on a wide range of projects.

Bugzilla is a "Defect Tracking System" or "Bug-Tracking System". Defect Tracking Systems allow individual or groups of developers to keep track of outstanding bugs in their product effectively. Most commercial defect-tracking software vendors charge enormous licensing fees. Despite being "free", Bugzilla has many features its expensive counterparts lack. Consequently, Bugzilla has quickly become a favorite of hundreds of organizations across the globe.

Buckets is a simple & intuitive task organization, cloud-based app that allows professionals & non-professionals alike to collaborate

ClockingIT is a free hosted application,keeping track of all yourtasks and the time youspend on them.Extensive featuresProject Management,Collaboration and Time Tracking

PMRobot combines Bug Tracking + Client Collaboration + Agile Project Management Software.

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.