* C, Objective-C, C++, CC++, Multicomputer C
* Pascal, Concurrent Pascal, Object Pascal, Oberon
* LISP, Scheme, Hope, PCN
* PostScript, Display PostScript, RenderMan
* csh, awk, Tcl, Perl, etc.
* SunOS, Solaris, Mach, Linux
* POSIX/Spec 1170 standards
* Macintosh (MacApp, OpenDoc)
* Windows (Win32, OLE)
* ApplicationKit, 3DKit, IndexingKit
* FoundationKit, Enterprise Objects Framework
* Distributed Objects, CORBA interoperability
* Servers: CERN, NCSA, MacHTTP
* Tools: libWWW, HTML specs, research work
* Extensions: CGI, W3Kit, forms
* Communicator, a POSIX-compliant remote control facility for implementing email connectivity, scripting, and file transfer.
* Confidant, a DES and RSA based NeXTSTEP encryption utility for email, multimedia documents, and files.
* eText, an extensible OO hypermedia document kernel that provides a WYSYWIG interface to several formats, including RTF, TeX, and HTML.