Postfix – Open Source Mail Transfer Agent

Postfix is a free and open-source mail transfer agent (MTA) that routes and delivers electronic mail, intended as an. Postfix has standards-complaint support for SMTP, LMTP, STARTTLS encryption, SASL authentication, MIME encapsulation and transformation, DSN delivery status notifications, IPv4 and IPv6.

Git for Linux

Open source version control system

Perhaps best known as the version control system for Linux, Git is also the choice of other well-known open source projects like Perl, Gnome, Ruby on Rails, Fedora and Debian. It offers a very fast, distributed method for tracking history and changes, with good support for branching and merging. Operating System: Windows, Linux, OS X Learn More...

Open Source School Management System

OpenSIS is a student information system sponsored by Open Solutions for Education, Inc. Its features include Student Demographic, Goals and Progresses, Contact Information, Gradebook, Report Cards management, Health Records management, Attendance management, Parent Portal and lot more.
It provides different access level privilege to Student, Teacher, Parent and Admin. It does support Library Services and Student Billing but it is part of enterprise edition. The best open source Student Information System (SIS) that will be equal to or better than the best commercially available SIS software in the market.

Keep it open source, always.
Bring out 3 to 4 version upgrades each year.
Release updates frequently.
Get customers involved and co-create.
Build a vibrant community that will spread the love.

Fedena - Open Source Management

School Management Software

Fedena is an open source school management software that has more features than a student information system. Use fedena to efficiently manage students, teachers, employees, courses & all the system & process related to your institution. Fedena is a one stop solution for all school management related issues and helps you manage student databases and all other activities online. It helps the schools and campuses that want an easy means to manage all campus records. It manages User, Time-table, Examination, Attendance, Student and News.