dm.paypal can be used to submit and process payments with the Paypal Instant Payment Notification system. It provides a base class for submitting payments and handling Paypal responses. Applications should create a sub-class of this base class to override a few functions to customize the details of the payment transactions and how the payment responses should be handled.
Multi-thread Simulation is a PHP class that can emulate the execution of program threads using separate HTTP requests to the same script. It establishes an HTTP connection to the same Web server to execute the same PHP script. It sends a request that passes the name a function to execute and an argument to be passed to that function. The requested script executes some code that detects the thread execution request and calls the specified function. When the thread request script ends, the return values of the called function are returned as a serialized string.
DOMjudge is an automated judgement system to run programming contests. It provides a mechanism to submit problem solutions and interfaces for teams, the jury, and the general public. It is lightweight, and depends on standard software to do its task. It has a Web interface for portability and simplicity. It is scalable, so distributed judging is easy. There is a modular system for plugging in languages and compilers. It features rejudging, clarifications, and detailed submission/judging info.
AutoGen is a tool designed for generating program files that contain repetitive text with varied substitutions. Its goal is to simplify the maintenance of programs that contain large amounts of repetitious text. This is especially valuable if there are several blocks of such text that must be kept synchronized. Output is specified with a Scheme-enhanced output template. Input, if required by your template, may come from AutoGen definitions, CGI data, or XML files.
The Model Railroad System is a software package that can help you run your railroad. It allows you to operate your layout, from running trains to working your signals and switches. It has support for a network of Bruce Chubb CMR/I USIC, SUSIC, and/or SMINI nodes, and/or a network of Lenz's XPressNet DCC nodes. Azatrax USB-connected Model Railroad Detectors are supported. Software to create switch lists for freight car forwarding and create timetables for your railroad are included. There is software to help with photographing your trains, and to compute the correct value for those pesky dropping resistors for LEDs and/or incandescent lamps.