Sharity is described as 'Connect your Unix computer to Windows, Samba or any other SMB/CIFS Server. Sharity is a cross platform network file system, mounting Windows shares transparently - just as if they were part of your local hard disk'. There are four alternatives to Sharity for Linux, Mac and BSD. The best alternative is Samba, which is both free and Open Source. Other great apps like Sharity are PowerBroker Identity Services (Free, Open Source), Linux Network File System (Free, Open Source) and CID (Free, Open Source).
Samba is the standard Windows interoperability suite of programs for Linux and Unix. Since 1992, Samba has provided secure, stable and fast file and print services for all clients using the SMB/CIFS protocol, such as all versions of DOS and Windows, OS/2, Linux and many others.
CID (Closed In Directory) is a set of bash scripts for inserting and managing Linux computers in "Active Directory" domains. Modifications made to the system allow Linux to behave like a Windows computer within AD.