| LGP-30 | An authored Librascope LGP-30 in your browser: the 1956 low-cost drum-memory, bit-serial vacuum-tube computer designed by Stan Frankel, with a 31-bit word, sixteen one-address orders and a Flexowriter typewriter, single-steppable and disassembled. | online |
| LinApple | Cross-platform Apple II/IIe emulator for Linux based on AppleWin. | downloadable |
| LisaEm | The first fully functional Apple Lisa emulator, by Ray Arachelian. | downloadable |
| Little Man Computer | An authored Little Man Computer that runs in your browser: 100 mailboxes, a 3-digit accumulator and a debugger you can single-step. | online |
| Longan Nano | The Sipeed Longan Nano (GigaDevice GD32VF103, RISC-V RV32IMAC) running real compiled firmware in a web browser: its on-board 160x80 ST7735S colour LCD, RGB LED and a USART serial console, with a full RISC-V debugger. | online |
| Luxor ABC80 | A Luxor ABC80, the 1978 Swedish Z80 home computer, booting its BASIC directly in a web browser. | online |
| littlemancomputer.co.uk | A free browser-based Little Man Computer implementation for learning low-level assembly concepts. | online |