FreeTDS
FreeTDS is an
open source (or free software if you prefer) programming library, a re-implementation of the
Tabular Data Stream protocol. It can be used in place of Sybase's db-lib or ct-lib libraries. It also includes an ODBC library. It allows many open source applications such as Perl and PHP (or your own C or C++ program) to connect to Sybase or Microsoft SQL Server.
FreeTDS is a source code library, though, not a binary one. It has to be linked to a program. For it to be useful to you in any way, you have to be prepared to break out your build tools.
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