Centre/SIS is a free student information system for public and non-public schools. Centre is a web-based, open source, student management product with features including student demographic info, scheduling, grade book, attendance, report cards etc.
Focus/SIS is an incredibly powerful tool for managing student data. The program includes gradebook, student records, attendence and is highly customizable.
Open Admin is a secure, web-based school administration program. It handles demographics, attendance, discipline records, report cards, grade books, online daybook plans, and special needs.
Koha includes modules for circulation, cataloging, acquisitions, serials, reserves, patron management, branch relationships, and more.
An open source data warehouse with custom report capabilities that is ideal for NCLB accountability.
SchoolTool is a project to develop a common global school administration infrastructure that is freely available under an Open Source licence.