The best replacement for ehcache is memcached.

The best alternatives to ehcache are rated as following:
★★★★★  memcached
★★★★★  guava
★★★★★  jcs
★★★★★  oscache
★★★★  hazelcast
★★★  ehcache-core
★★★  terracotta
★★★  jboss cache
★★  gridgain
★★  redis
★★  infinispan
★  gemfire
★  oracle coherence
★  bigmemory
★  memcache

Your alternative for ehcache is not listed? Suggest!
Speaking about ehcache, one probably shouldn't forget about terracotta.

Other search terms related to ehcache and their ratings are:
★★★★★ terracotta
★★★★ hibernate
★★★ jgroups
★★ hibernate 4
You have in mind a companion for ehcache and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of ehcache in all years. Click on graph for more.
ehcache
memcached
guava