This web site contains a lot of information about the Polyhedra family of relational DBMS products, including descriptions of the special features, and online copies of the reference manuals. A good place to start, though, is to have a quick look at a webcast giving a 5-minute demo of Polyhedra. Then, use the links in the left-hand tool bar to find out more!
Customers who have purchased Polyhedra developer licenses for particular platform(s) can take out annual support licenses, which allows them to contact the Polyhedra support desk to report bugs and problems; it also allows them to obtain new releases as they become available for their licensed platforms, including upgrades. People who are using the free Polyhedra Lite product can purchase annual support contracts if they wish, or can use the support forum - see below.
There is a special polyhedra-dbms Google Group that has been set up to act as a self-help user forum; all Polyhedra users are welcome to join that group and use it to answer questions. Of course, it is good netiquette to help fellow users by answering questions posted there...
This site is maintained by Enea staff, and we try to keep it accurate. However, as described here, errors will creep in; if in doubt, check with the reference manuals, all of which are available in PDF form for offline reading (and some are also available for online viewing). If you spot an error on this site and you have a support contract, you can report it via the Polyhedra helpdesk; if not, please report it via an email to email@example.com. (Please do not send support questions to the webmaster!)
Polyhedra webmaster will post something to the Twitter account @PolyhedraDBMS
While they are not officially supported platforms, Polyhedra Lite has been run on the BeagleBone Black and PandaBoard Black, without any problems being detected as yet. See here for more details!
Polyhedra 8.7 was released on schedule in March 2013. The main functional enhancements were the addition of locking, and of cascaded deletes. There is also an ODBC driver for use on the Raspberry Pi - this simplifies accessing Polyhedra from Python and PHP, for example, on this platform. More information on Polyhedra 8.7 can be found here.