| 44354 | Temperature Converter | ZX-Spectrum 16K/48K | English |
| 29525 | The Fourier Series | ZX81 2K | English |
| 24688 | Topografia | ZX-Spectrum 48K | Spanish |
| 42812 | Trace de la Dérivée | ZX-Spectrum 16K/48K | French |
| 27004 | Transform | ZX-Spectrum 16K | English |
| 38619 | Transformações Geométricas | ZX-Spectrum 48K | Portuguese |
| 8904 | Triangl | ZX-Spectrum 48K | Bosnian |
| 29401 | Triangle | ZX81 16K | English |
| 29665 | Triangle Areas | ZX81 1K | English |
| 18482 | Trigon | ZX-Spectrum 48K | Spanish |
| 24714 | Trigon | ZX-Spectrum 48K | Spanish |
| 18521 | Trigonomet | ZX-Spectrum 48K | Spanish |
| 18098 | Trigonometria | ZX-Spectrum 48K | Spanish |
| 18268 | Trigonometria | ZX-Spectrum 48K | Spanish |
| 29402 | Trigonometry | ZX81 16K | English |
| 8992 | Trzy Wymiary | ZX-Spectrum 48K | Polish |
| 8907 | Tuetenvolumen-Interpolation | ZX-Spectrum 48K | German |
| 26174 | Tumbledice | ZX-Spectrum 16K | English |
| 27521 | Turning Moment Caculator | ZX-Spectrum 16K | English |
| 25630 | Vari-Calc | ZX-Spectrum 48K | English |