The list is quite big but quite a few are noteworthy to be mentioned:
- Impala:
- Cloudera’s alternative Hortonwork’s Hive
- Faster than Hive as it is always running. So the startup time is minimal.
- Accumulo:
- altenative to Hortonwork’s HBase.
- Has cell based enhanced security model
- Redis:
- distributed in-memory data store like MemCached.
- caching layer of many web applications
- not only a caching tool but also data source
- Ignite:
- alternative to Redis
- ACID and SQL support
- ElesticSearch:
- Amazon’s search and analytics engine
- real time search as you type.
- Kinesis:
- Amazons alternative to Kafka.
- real time search as you type.