autogen.sh (a.k.a. buildconf) provides automatic build system preparation and is generally very useful to projects that use the GNU build system (i.e. the GNU autotools: autoconf, automake, and libtool). It is a POSIX shell script that is used for preparing a build system for compilation, verifying versions, ensuring necessary functionality, and overcoming many common build preparation issues.
BRL-CAD is a powerful constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing support for rendering and geometric analysis, path-tracing for realistic image synthesis, network distributed framebuffer support, and image and signal-processing tools.
The OpenCA Project is a collaborative effort to develop a robust, full-featured and Open Source out-of-the-box Certification Authority implementing the most used protocols with full-strength cryptography world-wide. OpenCA is based on many Open-Source Projects. Among the supported software is OpenLDAP, OpenSSL, Apache Project, Apache mod_ssl.