W.A.L.T. (Wizzy Active Lifestyle Telephone)

Developement: ~ 1990 - 1993
Status when discontinued: working prototype
Type: Pen-based communication tablet
Codename: W.A.L.T.

Designed in cooperation with BellSouth, WALT was a portable screen-based telephone. Aside from telephony, WALT featured an electronic address book, message pad and was able to send faxes. When connected to BellSouth's ANYWHERE Fax service, WALT could also receive faxes and even reply to them.
WALT featured a stylus for easy dialing and writing and also had buttons for the most important fuctions on front of the device.
Why WALT was discontinued is unclear.

PenLite

Developement: ~ 1993
Status when discontinued: working prototype
Type: Macintosh PowerBook Duo Tablet Computer
Codename: PenLite

The Macintosh PowerBook Duo Tablet computer was a combination of a PowerBook Duo computer and a tablet PC. It had a stylus pen, backlit display, vertically built-in floppy drive and ran standard MacOS software. The PowerBook Duo Tablet could also be connected to the Duo Docks and accessories.
The project was canceled in 1994 before the introduction of Newton Message Pad 100. Apple felt that it would be too confusing to have different pen-driven tablet computers.

Apple PowerBop

Developement: 1993
Status when discontinued: test phase
Type: Wireless LAN/Internet for PowerBook 180
Codename: ?

PowerBob was Apple first PowerBook with wireless internet access. It was developed in cooperation with Frace Télécom and accessed the Bi-Bop network France Télécom started installing all over Paris in the early 1990s. However, the GMS based service was extremely buggy, making PowerBop constantly loose the connection to the access points. Furthermore, although the Bi-Bop antennas were set up in a 200 meters radius, leaving one antennas zone and accessing the next one meant loosing the signal. And finally, the GMS receiver of the PowerBook required the removal of the disk drive.
The project was canceled after a test phase in 1993.

Starfish

Developement: ~ 1994
Status when discontinued: working prototype
Type: Apple Multimedia Projector
Codename: Starfish

Developed in cooperation with Epson, the Apple Multimedia Projector was a video projector for RGB and computer signals. The Apple Multimedia Projector could either be connected to a computer via RS-232 PC serial or LocalTalk interface or to a television or other video device via RGB. The Apple Multimedia Projector also featured an IR remote control for real-time cursor movement and built-in amplifier.
Apple left the project after the first working prototypes were developed. Epson continued to work on the project and the projector was later released as Epson ELP-3500 Multimedia Projector.

Apple Interactive Television Box

Development: 1993 - 1995
Status when discontinued: product announced / test phase
Type: Digital television set top box
Codename: ?

In cooperation with British Telecom (later renamed BT), Apple started developing an interactive TV set top box in 1993. Initial prototypes were tested internally only, but in 1994, Apple and BT launched a ITV trial in Britain with approximately 2,500 households participating. The media server technology was provided by Oracle. Later, the trail was expanded to Belgium where Apple was cooperating with Belgacom. A six-state US trial phase was announced in May 1995 featuring an educational programming by The Lightspan Partnership, Inc.
The final version of the Interactive Television Box featured a 68040 processor, 4 MB RAM, a 2 MB ROM and a MPEG-1 decoder. The boot-OS was a subset of the MacOS with QuickDraw and QuickTime software. It was equipped with stereo audio RCA jacks, one Mac serial port, one S-Video, RF in, RF out, one RJ-45 Ethernet, one ADB port and a HDI-30 SCSI port and dual SCART connectors. Furthermore, it also featured a proprietary expansion slot, one additional DIMM socket and a floppy drive connector (earlier models still featured a floppy drive and had to be booted from floppy disks).
A PAL and a NTSC version were produced in very limited quantities.
The project was canceled in late 1995 when it became obvious that ITV wasn't going to become commercially successful anytime soon.

PowerExpress Manhattan

Development: ~ 1996 - 1997
Status when discontinued: early testing phase
Type: Power Macintosh 7700 computer
Codename: PowerExpress Manhattan

PowerExpress Manhattan was designed as low-end desktop Power Macintosh computer, the successor of the Power Macintosh 7300. It was housed in the 'Outrigger' case (PowerMac 7500) and featured a G3 processor. However, its specifications were so similar to the Power Macintosh G3 Desktop project, that it was discontinued in favor of the PowerMac G3, which featured a more modern mainboard design.  

Stumpy

Development: ~ 1996 - 1997
Status when discontinued: early testing phase
Type: Power Macintosh 8700 computer
Codename: Stumpy

Stumpy was the designated successor of the PowerMac 8600. It was based on PowerExpress Manhattan, but with minitower form factor. It only had three PCI-slots, instead of the six of the PowerExpress, seven drive bays and PowerPC 640ev CPU.  

PowerExpress

Development: ~ 1996 - 1997
Status when discontinued: nearly shipping status
Type: Power Macintosh 9700 computer
Codename: PowerExpress

Power Express was designed as successor of the Power Macintosh 9600. Like the 9600, it featured the extremely popluar six PCI slots and was supposed to ship with either the new PowerPC G3 (@ 275 MHz) or two 604e processors (@ 350 MHz). It was also designed to have 12 RAM slots like the Workgroup Server 9650. Furthremore, Apple planed to offer a DVD-ROM drive as bto-option. The form factor of the Power Macintosh 9700 was the so-called 'K2' case of the Power Macintosh 8600/9600. Even the layout of the backpanel was identical to the PowerMac 9600.
PowerExpress also featured a list of new chipsets, amongst others the new VLSI-I/O controller 'Heathrow' (also incorporated in the Power Macintosh G3 mainboard design), new video controller ('Nine99'), new memory controller ('Lauren', 'Little Boy'), new PCI I/O controller ('Denali') and the new audio controller 'Screamer' (later also used on the Power Macintosh G3).
Like PowerExpress Manhattan and Stumpy, the PowerExpress project was canceled because of the similarities to the Gossamer-PowerMac G3 project, which would have outperformed the PowerExpress PowerMac.

FireDrill

Development: 1997
Status when discontinued: produced in limited quantities
Type: Audiovisuals PCI card
Codename: FireDrill

With the release of Intel Pentium processors with MMX technology, Apple needed to add powerful multimedia capabilities to their PowerMac computers. As an answer, Apple developed a PCI audiovisuals card with 100-MHz Philips TriMedia chipset, an inexpensive but powerful 32-bit processor. Furthermore, it featured two FireWire ports for real-time video editing and one audio in and one audio out port. The TriMedia processor was not only designed for graphics acceleration, but also allowed video conferencing and supported AC-3 audio with six independent surround sound channels and advanced sound synthesis.
Apple also developed a model without the FireWire ports, code-named 'FireBlast'.
The card was never officially released, although limited quantities were produces and are nowadays available for sale on the internet. Apple canceled the release of the card because by the end of 1997, the new PowerMac G3 already had most of the features of FireDill implemented. Furthermore, the quickly increasing processor speed of the Macs soon made FireDrill obsolete. Why Apple didn't release the card as add-on card for older PowerMacs is unknown.