Task Freak: Open Source web based task manager - PHP
Website: taskfreak.com
Demo: Click Here
Download Page:
single user / SQLite v0.5.1
single user / mySQL v0.5.1
multi user / mySQL v0.6.1
Features:

Simple and easy to use - user friendly
organize by project and context, order tasks by priority and deadline
complete and relatively easy to customize, update, upload and get running.
easy setup with [...]

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CATS : Open Source Applicant Tracking System
Website: catsone.com
Demo:Click Here
Username: john@mycompany.net
Password: john99
MyCompany.NET
Download Page - Click Here
Features:

EEO / EOC Data Collection and Reporting
Customer Relationship Management (CRM)
Full-Text Resume Search
Career Portal with Online Applications
Candidate Management
Job Order / Position Tracking
Dashboard and Live Reports
Job Application Workflow
Website Integration
Calendar
E-Mail Notifications
Website Integration
Accessible from anywhere over the Internet-100% Web Based
Clutter-free design to get [...]

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dotproject - the Open Source Project Management tool
Website: dotproject.net
Demo: Click Here
ADMIN Access
This will let you do just about anything except administer the users themselves.
Username: admin
Password: admin
GUEST Access
This is a restricted READ-ONLY USER and lets you see how the permissions work.
Username: guest
Password: guest
Download Page: Click Here
Features:

Day to day support is provided free by volunteers.
Framework that includes [...]

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