TagEventor is a project to enable radically simple computer usage by creating physical-object-based user interfaces. It does this using commercially available (and relatively cheap), standardized RFID technology in the form of small, simple USB connected contacted card/tag readers and small, cheap tags. The project was started based on products available from the "touchatag" company, which has clients for Windows and Mac, and run their own Web service to enable many interesting Web-based applications. However, no simple, lightweight Linux client was available, and the Web focus meant that some client-focused functionality was not possible. The software is currently a daemon that monitors the presence of one or more RFID tags on a connected reader and generates "system events" when tags are placed on it or removed from it.
jniThreadCPUUsage is a Java library to get the amount of user and system CPU time used per thread. This is done via JNI, which calls getrusage() on the system. getrusage() is only available on Linux 2.6.26 or later and Solaris. One useful application of this is measuring the amount of CPU time used for a servlet request. getrusage() CPU time reporting is better than using the real time clock because it measures actual CPU time used and disregards times when the thread is idle or waiting (such as when it is waiting for network I/O).
Nit is a statically typed object-oriented programming language. The goal is to propose a statically typed programming language where structure is not a pain. It has a simple, straightforward style and can usually be picked up quickly, particularly by anyone who has programmed before. While object-oriented, it allows procedural styles. The Nit Compiler (nitc) produces efficient machine language binaries.
The Chameleon Problem Solving Environment is based on the CPACS data format and allows third party application coupling for multidisciplinary simulation. It comprises a set of libraries and integration components for the commercial integration environment ModelCenter or the open source alternative RCE (http://www.rcenvironment.de/). It was initially developed from the German Aerospace Center (DLR).
TIXI is a fast and simple XML interface library for applications written in C, C++, Fortran, Java, and Python. Although simplified and somewhat restricted compared to a fully-fledged XML processing library, it can create documents, create and delete nodes, and add and remove element attributes. Routines for reading and writing text nodes and nodes holding integer and floating point numbers are included, along with routines that process aggregates of these simple types for the processing of geometric data, multidimensional arrays, or arrays of vectors.
The TIGL Geometry Library can be used for easy processing of geometric data stored inside CPACS data sets. TIGL offers query functions for the geometry structure. These functions can be used, for example, to detect how many segments are attached to a certain segment, which indices these segments have, or how many wings and fuselages the current airplane configuration contains. This functionality is necessary because TIGL targets not only the modeling of simple wings or fuselages but also the description of quite complicated structures with branches or flaps. The library uses the OpenCASCADE software to represent the airplane geometry by B-spline surfaces in order to compute surface points and also to export the geometry in the IGES/VTK format. The library provides external interfaces for C, C++, Python, Java, and FORTRAN.
MirrorBrain is a framework to run a content delivery network using mirror servers. It solves a challenge that many popular open source projects face: a flood of download requests, often magnitudes more than a single site could practically handle. A central (and probably the most obvious) part is a "download redirector" that automatically redirects requests from Web browsers or download programs to a mirror server near them. Choosing a suitable mirror for a user's request is the key, and MirrorBrain uses geolocation and global routing data to make a sensible choice and achieve load-balancing for the mirrors at the same time. The algorithm is both sophisticated and easy to control and tune. In addition, MirrorBrain monitors mirrors, scans them for files, generates mirror lists, and more.
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.