Hibernate 4 jars can be downloaded from the SourceForge web site at http://sourceforge.net/projects/hibernate/files/hibernate4.  If this url doesn’t work or get changed, just search ‘hibernate 4 jars download sourceforge’ in Google.  The distribution version downloaded here is 4.2.4. Except for the version numbers, the jar names and folder structure should be same across any version of hibernate4 distribution.  

Under lib\required:

• antlr-2.7.7.jar
• dom4j-1.6.1.jar
• hibernate-commons-annotations-4.0.2.Final.jar
• hibernate-core-4.2.4.Final.jar
• hibernate-jpa-2.0-api-1.0.1.Final.jar
• javassist-3.15.0-GA.jar
• jboss-logging-3.1.0.GA.jar
• jboss-transaction-api_1.1_spec-1.0.1.Final.jar

Under lib\optional\c3p0

• c3p0-0.9.2.1.jar
• hibernate-c3p0-4.2.4.Final.jar
• mchange-commons-java-0.2.3.4.jar

Under lib\optional\ehcache

• ehcache-core-2.4.3.jar
• hibernate-ehcache-4.2.4.Final.jar
• slf4j-api-1.6.1.jar

Under lib\optional\infinispan

• hibernate-infinispan-4.2.4.Final.jar
• hibernate-infinispan-4.2.4.Final-tests.jar
• infinispan-core-5.2.0.Beta3.jar
• jboss-logging-3.1.1.GA.jar
• jboss-marshalling-1.3.15.GA.jar
• jboss-marshalling-river-1.3.15.GA.jar
• jgroups-3.2.0.CR1.jar
• rhq-pluginAnnotations-3.0.4.jar
• stax2-api-3.1.1.jar
• staxmapper-1.1.0.Final.jar
• woodstox-core-asl-4.1.1.jar

Under lib\optional\proxool

• hibernate-proxool-4.2.4.Final.jar
• proxool-0.8.3.jar

Under lib\envers

• hibernate-envers-4.2.4.Final.jar

Under lib\jpa

• hibernate-entitymanager-4.2.4.Final.jar

Under lib\osgi

• hibernate-osgi-4.2.4.Final.jar
• org.osgi.core-4.3.1.jar