https://extensions.joomla.org/extension/vm-payment-btcpay-for-virtuemart/
VM Payment - BTCPay for VirtueMart, by Andreas Tasch - Joomla Extension Directory
A VirtueMart (Version 3 and 4) payment method plugin to integrate with BTCPay Server as a payment processor.
andreas tasch joomlavmpayment
https://extensions.joomla.org/extension/miscellaneous/development/less-compiler/
Less Compiler, by Andreas Tasch - Joomla Extension Directory
A system plugin to automatically compile templates .less files on page load - for easier template development. Available are different versions of lessphp...
andreas tasch joomlaless