The PLCIO library reads and writes data to a variety of programmable logic controllers (PLC). Now in its 20th year, PLCIO is a stable platform allowing the programmer to address PLC memory by their tag names for different data types, regardless of the computer architecture, with the PLC linked either directly or remotely. PLCIO abstracts the application and communications layers so that the programmer of the business and database logic need not worry about the communication details. Full source code is included, as are samples and a CGI interface for PLC access from a Web browser. It runs under Linux, HP-UX, Solaris, and QNX, and can be used as a replacement for the aging Interchange software by Allen-Bradley. PLCIO supports the Serial DF1 and Ethernet protocols of the Allen-Bradley PLC-5, SLC 500, ControlLogix, CompactLogix, and MicroLogix PLCs (using the CIP protocol), the Modicon Quantum PLC, the Wago 750-842 PLC, the Siemens Step5 PLC (using the AS511 serial protocol or via Ethernet using the INAT Echolink), and the Siemens Step 7 200, 300, and 400-series CPUs. It also supports communicating directly with an I/O bus terminal such as the Beckhoff BK9105 or the Phoenix Contact FL IL 24 BK ETH/IP-PAC.
Vocab Builder is a collection of two separate programs. The client is the testing application that uses a drill-style method of building your vocabulary in a foreign language, similar to using flash-cards. The editor allows you to create a new, or modify an existing, database for your own personal use. Since the design of the project allows a user to create their own databases/tests, they can not only focus on the words they want/need to learn, but also are not restricted by availability of choice. No more are you restricted by only the databases available to you. Many language teaching applications only allow you to learn the languages they've supplied you. Most North American-based programs cater to English speaking users and only give you a selection of other languages to choose from. Not only can Vocab Builder use any language combination of Native and Secondary languages but it's also open-ended. You can share your tests with others. You can expand the database of words in any direction you want. Word lists are meant to be broken down into categories like colors, sizes, numbers, etc.
Mod_Dosblock is an Apache module written to provide Dos/DDoS protection at the HTTP layer. It works on HTTP URLs or HTTP headers, and can throttle requests based on the incoming URI/header pattern. This module can be particularly useful in an architecture where the content serving Web servers sit behind reverse proxy Apache servers exposed to the Internet. The gateway servers can throttle/DoS protect HTTP queries, saving the actual serving Web servers.
The PostgreSQL extension for CLIPS Expert System provides access to a PostgreSQL database from the CLIPS environment by exposing a number of CLIPS functions. CLIPS users who are familiar with SQL should not have much difficulty in learning how to use the additional functions to interact with the database from the CLIPS environment.