1.Koha -Education
Koha is an open source integrated library system (ILS) maintained by and used by libraries all over the world.
With open source software people often think that the only way to
contribute is to write code, this is not true. By simply using the
product, reporting problems and suggesting improvements you’re
contributing. What makes open source software so much better than
proprietary software is the back and forth that takes place between
those using the software and those writing it. With Koha the developers
are very open to suggestions from those using the ILS and always use
these suggestions as the building blocks for the next release.
2. OpenStack -Cloud Computing
OpenStack is an open and scalable operating system for building public and private clouds. It provides both large and small
organizations an alternative to closed cloud environments, reducing the risks of lock-in associated with proprietary
platforms. OpenStack offers flexibility and choice through a highly engaged community
of over 6,000 individuals and over 190 companies
including Rackspace, Dell, HP, IBM, and Red Hat
3. Project Libre- project management
ProjectLibre is an open source project management software solution
developed as an alternative to Microsoft Project. As with other project
management tools, ProjectLibre maintains a list of tasks for users and
automatically organizes and tracks tasks and projects as progress is
made or they’re completed.
4. Open DayLight- networking
The Open DayLight,
the software-defined networking industry consortium that features IBM
and Cisco among its roster of members, has released the first version of
its SDN and NFV (network functions virtualization) software, Hydrogen.
Hydrogen, which is Eclipse-licensed, comes in three editions: Base
Edition, Virtualization Edition, and Service Provider Edition, each
aimed at different markets.
5. Zanata, an open source translation platform
you can also find other best project done in open source....
Suggest them in comment below post....
Detailed information of each project can be obtained from their official websites..