Here you can access to Vtiger or YetiForce demo version.
Instances are plublic, so it's raccomended to insert only not real data for privacy issues.
Extensions / Plugins
User access (username / pw)
yetiforceuser / yetiforceuser
Admin access (username / pw)
yetiforceadmin / yetiforceadmin
Link
https://yetiforce.penguinable.it