In the proprietary Unix world, Sharity is a common solution to mounting SMB shares, as the usual recommended workaround — to run Services for UNIX on the Windows file server and make the share available via NFS — is frequently unreliable in practice.
Sharity works by making an external SMB share appear to the kernel as an NFS-mounted file system.
(Compare to smbclient from Samba, which either provides an FTP-like interactive shell or sends commands to the Windows file server to be executed remotely.)
The program runs on the following Unix and Unix-like operating systems: macOS, IRIX, Solaris, HP-UX, FreeBSD, NetBSD, OpenBSD, BSD/OS, Tru64, AIX, NEXTSTEP, OpenStep, UnixWare, SunOS 4, and Linux.
Sharity is a rewrite of an earlier program, Sharity-Light, which is free software under the GPL (having been derived from smbfs in Linux) but is limited in capabilities and is no longer developed.