FreeTDS is a free software programming library, a re-implementation of the Tabular Data Stream protocol.
It allows many open source applications such as Perl and PHP (or any C or C++ program) to connect to Sybase ASE or Microsoft SQL Server.
However, recent releases of FreeTDS do include some client programs, such as fisql (a replacement for the isql utility programs distributed by Sybase and Microsoft).
For scripting languages, FreeTDS is used in conjunction with a module for that language such as DBD::Sybase in Perl, Python-Sybase for Python, or Ruby DBI for Ruby jTDS is a Java implementation of FreeTDS, available on SourceForge.
jBCP extends jTDS to include Sybase Bulk Copy Program (BCP) extensions.