From: "Dean, Robert"
They have a free version, if you don't want to pay for support.
And read the license. There are usage restrictions.
-Nathan
Program-unique Terms 
1) Redistribution Information 
This Agreement does not permit redistribution of the Program; however, a 
redistribution license may be available under a separate agreement for the 
binary code versions of the Program. Please contact an IBM Sales Representative 
or revisit the location from which you obtained the Program to obtain 
information for the appropriate royalty-free distribution license. 
2) Usage Restrictions 
The following restrictions apply to the Program: 
2.1) Resources 
The total amount of resources allocated to all DB2 instances on a given server 
cannot exceed: 
a) 2 processor cores; and 
b) 2GB of memory 
where a server is defined as a dedicated physical server or a virtual server 
created by partitioning a physical server. 
Any other use requires that you acquire a different edition of the Program under 
the terms of the International Program License Agreement. 
2.2) Clustering Software 
This Program may not be used in a clustered database environment. A clustered 
database environment in this case refers to DB2 Express-C being run on a group 
of servers connected together to create a single database image to facilitate a 
performance gain or to act in a high availability and disaster recovery 
scenario. All clustering environments, regardless of implementation, are 
restricted. 
2.3) Optional Add-on Features 
You are not authorized to use any of the following with the Program: 
Database Partitioning Feature, Performance Optimization Feature, Homogenous 
Replication Feature, High Availability Feature, Governor, Storage Optimization 
Feature, Materialized Query Tables, Multi-Dimensional Clustering, Query 
Parallelism, Connection Concentrator, Label Based Access Control, Geodetic 
Extender, and Workload Management. 
      
 
As an Amazon Associate we earn from qualifying purchases.