You can download WSS 3.0 Application templates for creating scenario sepecific sites and solutions.
Some of these templates have to be deployed on Site level and some at server level targeting different scenarios.
Following are thier lists;
Site Admin Templates Board of Directors Business Performance Reporting Case Management for Government Agencies Classroom Management Clinical Trial Initiation and Management Competitive Analysis Site Discussion Database Disputed Invoice Management Employee Activities Site Employee Self-Service Benefits Employee Training Scheduling and Materials Equity Research Integrated Marketing Campaign Tracking Manufacturing Process Management New Store Opening Product and Marketing Requirements Planning Request for Proposal Sports League Team Work Site Timecard Management
Server Admin Templates Absence Request and Vacation Schedule Management Budgeting and Tracking Multiple Projects Bug Database Call Center Change Request Management Compliance Process Support Site Contacts Management Document Library and Review Event Planning Expense Reimbursement and Approval Help Desk Inventory Tracking IT Team Workspace Job Requisition and Interview Management Knowledge Base Lending Library Physical Asset Tracking and Management Project Tracking Workspace Room and Equipment Reservations Sales Lead Pipeline
There are currently 40 templates available. Following is the reference site; http://www.microsoft.com/technet/windowsserver/sharepoint/wssapps/templates/default.mspx