PostgreSQL is a robust relational database system with over 25 years of active development that runs on all major operating systems. It is fully ACID compliant, and has full support for foreign keys, joins, views, triggers, and stored procedures (in multiple languages). It includes most SQL92 and SQL99 data types, including INTEGER, NUMERIC, BOOLEAN, CHAR, VARCHAR, DATE, INTERVAL, and TIMESTAMP. It also supports storage of binary large objects, including pictures, sounds, or video. It has native programming interfaces for C/C++, Java, .Net, Perl, Python, Ruby, Tcl, and ODBC, among others, and exceptional documentation.
pgFormatter is a SQL formatter/beautifier which supports keywords from SQL-92, SQL-99, SQL-2003, SQL-2008, and SQL-2011, and PostgreSQL-specific keywords. It can work as a console program or as a CGI system. It will automatically detect its environment and output as text or as HTML according to the context.