As of 0.54, there are Unix ports of most of the traditional PuTTY tools, and also one entirely new application.
If you look at the source release, you should find a unix
subdirectory. There are a couple of ways of building it, including the usual configure
/make
; see the file README
in the source distribution. This should build you Unix ports of Plink, PuTTY itself, PuTTYgen, PSCP, PSFTP, and also pterm
- an xterm
-type program which supports the same terminal emulation as PuTTY. We do not yet have a Unix port of Pageant.
If you don't have Gtk, you should still be able to build the command-line tools.
Note that Unix PuTTY has mostly only been tested on Linux so far; portability problems such as BSD-style ptys or different header file requirements are expected.