The latest version of Splunk is described as:
Operational Intelligence for Everyone
Splunk Enterprise is the leading platform for real-time operational intelligence. It’s the easy, fast and secure way to search, analyze and visualize the massive streams of machine data generated by your IT systems and technology infrastructure—physical, virtual and in the cloud.
Splunk Enterprise 6 is our latest release and delivers:
- Powerful analytics for everyone—at amazing speeds
- Completely redesigned user experience
- Richer developer environment to easily extend the platform
The current download page promises the enterprise version for 60 days. At the end of that period you can convert to a Free license or purchase an Enterprise license.