Mainframe Users:
For Hercules Users and those assisting making Z/OS easier to use, or some way spreading knowledge of the platform, Jol is free.
For normal Commercial Use, the cost varies from $1.00 per user for non-profits to $5.00 a day per user for normal commercial enterprises.
Commercial Unlimited Site Licences start at $99,000.
Source Code is available for security and enhancements. It is available on the clear understanding that it may not be used to develop competing products.
To Buy - non-Profits
Corporates Buy Here