Download software for ZX81 and emulator

Here I will present some nice software for your ZX81 which is written by ZX-TEAM members and cannot be found in other sites.

FAQ: how can I load programs from my PC into a real ZX81? Use ZXTAPE from Wilf Rigter!

ZX80, ZX81 and JUPITER-ACE emulators

Sorry, not complete, please be patient!
Do you search the legendary 1Kchess programm for your ZX81?