Download of SQuirreLSQL 3.2.1 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application lies within Developer Tools, more precisely DB Tools. The most popular version of the program is 3.2. This free Mac application was originally developed by Squirrelsql.org. We recommend checking the downloaded files with any free antivirus.
From the developer:
SQuirreLSQL is a graphical Java program that will allow you to view the structure of a JDBC compliant database. The graph plugin allows the user to create table charts. Code completion can be used to access drop-down lists of options that include keywords, tables, columns, views, stored procedures. Code completion also provides join generation functions.
You may want to check out more software for Mac, such as SQLEditor, SQLiteManager 4 or Querious, which might be similar to SQuirreLSQL.