Free to manage software for linux

FreeSMS project is an application for managing an educational facility.
It stands for Free Student Management System and it manages teachers and students and provides marketing, registration, course management, attendance, and a student evaluation system, and manages courses within a class environment.
Profile-based management is supported for administrators, teachers, and students. Teachers and students can be registered online.
Students are allowed to manage their own class enrolment and submit course evaluations, and teachers can manage student attendance.
The differential factor and elegance of this project lie in the OOP standard and a modular structure. The code is clean and very extendable.
Main features:
- Manage courses within a class environment
- Sopport for profile based management: Administrator, Teacher and Student
- Online teacher and student registration
- Allow students to self manage class enrollment
- Allow teachers to manage student attendance
- Ability for students to submit course evaluations

PloneSubscription provides a tool supporting different levels of subscription and notification

This product allows users to manage their subscriptions and to administrators manage group-wide subscriptions.

IPlib is a Python module to convert between many different IP address notations and to manage netmask/address pairs in the CIDR notation.

Some example scripts ("ipconv", "nmconv", and "cidrinfo") are included.

KZenExplorer allows to manage the tracks and playlist on any mp3 player supported by libnjb. It also allows to create smart playlists, add ratings and select categories for the tracks on the player.

MyCMS www provides a Web interface for MyCMS.

MyCMS www is a set of Perl CGI scripts to access the articles stored in a MyNews server and to manage authors and moderators.