It's only a few modules but you do get a free practice test out of the deal.
Don't know how long it'll last but you can get a free trial of Labsim for 7 days at LabSim CCNA (Cisco Certified Network Associate) Certification Training just click on the free trial box and fill in your info. It includes access to the following products
The 70-680 is probably the most attractive one to me, to be honest.
- A+ Essentials (220-701)
- A+ Practical Application (220-702)
- Network+ (N10-004)
- CCNA (640-802)
- Active Directory Configuration Server 2008 (70-640)
- Configuring Windows 7 (70-680)