Computacalc
Electronic worksheet with an almost unlimited range of applications. 16K.
Timex/Sinclair 1000
Constellation
Turn your ZX81 into a telescope. Produces a simulation of the night sky as seen from any position on Earth at any chosen time this century. You may point your telescope in any direction, move it up, down, left or right, zoom in or out. Stars may be displayed by magnitude or constellation. 16K.
Dictator
You have become the 129th ruler of Ritimba with a single goal in mind: take full advantage of the situation for your own good. You have to deal with a handful of factions: unruly army, downtrodden peasants – but you have the secret police on your side. 16K.
Gamestape 1
10 games, including: Klingons, Crash Landing, Simon, Artist, UFO, Code (Mastermind), Asteroids, Bomber, Kaleidoscope, Guillotine (Hangman). Breakout, in machine language, was added to the Melbourne House version. The rest are in BASIC.
3 Port I/O board
Programmable 8255 PIA. Space for analog-to-digital converter, relays, clock chip, etc. Expansion connector for RAM pack.