PostGIS adds support for geographic objects to the PostgreSQL object-relational database. In effect, PostGIS "spatially enables" the PostgreSQL server, allowing it to be used as a backend spatial database for geographic information systems (GIS), much like ESRI's SDE or Oracle's Spatial extension.
Eero is a binary-compatible variant of Objective-C 2.0, implemented with a patched version of the Clang/LLVM compiler. It features a streamlined syntax with improved readability and reduced code clutter, as well as new features such as Python-like indentation and a limited form of operator overloading. It is inspired by languages such as Smalltalk and Ruby.
Apptools is a collection of programs for accessing Applix 1616/OS disk images. It is similar to 'mtools' and 'cpmtools' for MS-DOS and CP/M disks. The tools have been tested on Applix 1616/OS floppy disk images, but should work on hard disk images. The tools are limited to reading and only work with raw disk images. The collection includes programs for listing, copying, displaying, and reporting, and all tools allow recursive and wildcard operations.