Open Source School management System

There are some open source school management system which are useful for managing our educational institutions.

FEDENA IS A FREE & OPENSOURCE 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.
project web site http://www.projectfedena.org/

Open-School is an Open Source School Management System that handles all requirements for easy school management. The purpose of this software is better interaction between students, teachers, parents & management.
http://www.open-school.org/

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.
http://opensis.com/

SchoolTool is an open source, web based student information system designed for schools in the developing world, with strong support for translation, localization and automated deployment and updates via the Ubuntu Linux installer and package management system.
http://www.schooltool.org/