CTAN has a new package: pstdoc
SQLite database and Python script that provides extensive help with PSTricks commands from a Terminal window. Eg pstdoc \psarc gives the syntax os \psarc and all associated keywords, with short definitions. Works well on Mac. OK on Win, should work with Linux. The database covers pstricks, pst-plot, pst-node, pst-text, pstricks-add, pst-3dplot and related packages.
This package is located at http://tug.ctan.org/tex-archive/info/pstdoc . More information is at http://tug.ctan.org/pkg/pstdoc (if the package is new it may take a day for that information to appear). We are supported by the TeX Users Group http://www.tug.org . Please join a users group; see http://www.tug.org/usergroups.html .
pstdoc – A tool for PSTricks documentation
The bundle provides an SQLite database and a Python script that provides extensive help with PSTricks commands from a terminal window.
For example pstdoc \psarc gives the syntax of \psarc and all associated keywords, with short definitions.
The script is known to work on Mac, Windows, and Linux systems; it requires Python 2.5 or better.