Common Resource Grep
eXist-db is a feature rich Open Source native XML database
Search engine and data mining applications and ClueWeb datasets.
CAM XML Editor for XML+JSON+Hibernate+SQL Open-XDX sponsored by Oracle
Command-line sql JDBC tool
Adhoc Data Exploration - Live & Easy
GUI Tools for HBase (including PIG and high speed Hive Query)
Free data acquisition and data visualization cross-platform software
.NET, PowerShell, SQL, Java, Perl, and Javascript developer libraries
JAFFA is a Rich Web 2.0 POJO based Event-Driven SOA framework