| Type ▼ | Name | Year ▼ | Publisher ▼ |
|---|---|---|---|
| Sinclair ZX-81 cass. |  Rental Property Manager | 198? | Data-assette |
| Sinclair ZX-81 cass. | RENUM Renumbering Program | 1982 | Bug-Byte London, England |
| Sinclair ZX-81 cass. | RPN Calculator | 1982 | Zeta Soft. |
| Sinclair ZX-81 cass. | Screen Kit 1 | 198? | Picturesque |
| Sinclair ZX-81 cass. | Similes Countdown | 1981 | AVC Soft. |
| Sinclair ZX-81 cass. | Statistics | 198? | Zeta Soft. |
| Sinclair ZX-81 cass. | Statistics Model 02-1000 | 1982 | Timex Corp. |
| Sinclair ZX-81 cass. | Stock Market Tech. Analysis 1 Model 03-1005 | 1982 | Timex Corp. |
| Sinclair ZX-81 cass. | Super Math Model 03-3000 | 1982 | Timex Corp. |
| Sinclair ZX-81 cass. | Tables Countdown | 1981 | AVC Soft. |
| Sinclair ZX-81 cass. | Talkback | 1983 | Ringrose, M.W.F. |
| Sinclair ZX-81 cass. | Tapebook 50 1K | 198? | Control Technology |
| Sinclair ZX-81 cass. | Tasword | 1982 | Tasman Soft. |
| Sinclair ZX-81 cass. | Technical Literacy Series | 1983 | National Education Corp. |
| Sinclair ZX-81 cass. | The Budgeter Model 03-2001 | 1982 | Timex Corp. |
| Sinclair ZX-81 cass. | The Carpooler Model 03-2005 | 198? | Timex Corp. |
| Sinclair ZX-81 cass. | The Checkbook Manager Model 03-2003 | 1982 | Timex Corp. |
| Sinclair ZX-81 cass. | The Computer Coach Model 03-3021 | 1983 | Timex Corp. |
| Sinclair ZX-81 cass. | The Coupon Manager Model 03-2004 | 1982 | Timex Corp. |
| Sinclair ZX-81 cass. | The Electronic Checkbook | 1982 | Timeworks |
| Sinclair ZX-81 cass. | The Fast One | 198? | Campbell Systems |
| Sinclair ZX-81 cass. | The Home Asset Manager Model 03-2009 | 1982 | Timex Corp. |
| Sinclair ZX-81 cass. | The Home Improvement Planner Model 03-2008 | 1982 | Timex Corp. |
| Sinclair ZX-81 cass. | The IRA Planner Model 03-2010 | 1982 | Timex Corp. |
| Sinclair ZX-81 cass. | The List Manager Model 03-1004 | 1982 | Timex Corp. |
| Sinclair ZX-81 cass. | The Loan/Mortgage Amortizer Model 03-2002 | 1982 | Timex Corp. |
| Sinclair ZX-81 cass. | The Organizer Model 03-2000 | 1982 | Timex Corp. |
| Sinclair ZX-81 cass. | The Stamp Collector Model 03-2006 | 1982 | Timex Corp. |
| Sinclair ZX-81 cass. | The Starter Model 02-3000 | 1981 | Timex Corp. |
| Sinclair ZX-81 cass. | The Stock Option Analyzer Model 03-2007 | 1982 | Timex Corp. |
| Sinclair ZX-81 cass. | The ZX81 Pocket Book | 1982 | Phipps Associates |
| Sinclair ZX-81 cass. | Toolkit | 198? | Artic Computing, Ltd. |
| Sinclair ZX-81 cass. | Toolkit | 1982 | JRS Soft. |
| Sinclair ZX-81 cass. | Toolkit | 198? | Sinclair Research, Ltd. |
| Sinclair ZX-81 cass. | Trace | 1983 | Texgate Computers |
| Sinclair ZX-81 cass. | Tutor German | 1983 | Artic Computing, Ltd. |
| Sinclair ZX-81 cass. | Tutor Spanish | 1983 | Artic Computing, Ltd. |
| Sinclair ZX-81 cass. | Variance Analyzer | 198? | Zeta Soft. |
| Sinclair ZX-81 cass. | Vector Mathematics | 1982 | Smith, W.H. |
| Sinclair ZX-81 cass. | Video Graffiti | 1982 | AGF Hardware |