CertExams Router Simulator v2.2.1 | 8,83 Mb.
— Lab exercises - currently 40+ labs are included.
— Router console simulator, switch simulator.
— Simulate upto 3 Cisco® IOS routers
— 200+ router/switch commands supported
— Labs for 1900 and 2950 switches included
— Detailed help files
— The demo version is limited to a fewer labs, and upto global configuration mode is supported in demo version.
— Support short form commands in IOS simulator.
See more on developers site.