Download links:

WebAcappella FX (April 2019) (Mac - Windows)
WebAcappella FX has not been updated since February 2024 and no technical support is now provided

WebAcappella GRID (1.6.20 - 2016) (Mac - Windows) tested with PHP 8.3
WebAcappella GRID has not been updated since January 2023 and no technical support is now provided

WebAcappella 4 (2010) (Mac - Windows) #4.6.27
WebAcappella 4 has not been updated since 2017 and no technical support is now provided
Only works on macOS 32-bit (High Sierra) and Windows 32-bit (PHP 5.6) systems

WebAcappella Market (2018) (Mac - Windows) - requires PHP 7.4 and MySql
WebAcappella Market is no longer updated since 2021 and no technical support is now provided

WebAcappella 3 (Mac - Windows)
WebAcappella 3 is no longer updated since 2014 and no technical support is now provided