The 188.8.131.52 version of SQL*PLUS is provided as a free download on our software library. The latest setup package occupies 3 MB on disk. SQL*PLUS lies within Development Tools, more precisely Database Tools. This free software was originally developed by Memfix.
From the developer:
It's a simple and efficient SQL Server reporting and automation tool. SQLS*Plus supports use of variables (var, define, &, &&), interactively accepts user input into variables, spools data into TEXT, HTML, CSV and JSON output. Lots of other advanced functionality is available, such as BREAK and COMPUTE functionality.
You may want to check out more software, such as Benthic Software: Golden or Aspen InfoPlus.21, which might be related to SQL*PLUS.