In the Perl world I currently maintain DBD::ODBC and DBIx::Log4perl and contribute to DBI and DBD::Oracle. I have also written some commercial ODBC and XML drivers for Easysoft Limited. I mostly use Perl and pl/sql these days with some sprinkling of C (mostly Perl XS) but in my past I've used Fortran, Macro32, Assembler, C++ and even wrote some in kernel streams drivers in C for various unixes.
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