Salesforce Applications are developed in a low-code proprietary environment (i.e. a "comfortable/productive/expensive walled garden"). Cloud foundry is made to work with open-source apps/code (which is a completely different approach to software development). I don't know of any tools that could help you in this process and the most likely scenario is a complete refactoring of the Salesforce apps.
If your problem is cost, there are ways to reduce licensing costs (negotiation with salesforce, changing the user types, make some functionality available in force.com sites, community portals, data integration with external apps, etc.).
Salesforce Applications are developed in a low-code proprietary environment (i.e. a "comfortable/productive/expensive walled garden"). Cloud foundry is made to work with open-source apps/code (which is a completely different approach to software development). I don't know of any tools that could help you in this process and the most likely scenario is a complete refactoring of the Salesforce apps.
If your problem is cost, there are ways to reduce licensing costs (negotiation with salesforce, changing the user types, make some functionality available in force.com sites, community portals, data integration with external apps, etc.).