Tim Mann's TRS-80 Page  
   Though he gave away his TRS-80 Model "I" long ago, he has a pile of old Model "I" technical and hardware manuals, and a good memory. If you have questions, he can probably answer them.
   http://www.research.digital.com/SRC/personal/Tim_Mann/trs80.html

Paul Robson's Emulator Pages  
   To build these you will need the shareware A86 assembler (easily available) and a 'C' Compiler. The programs were written in Borland's Turbo C 2.0 but should compile fairly easily under most compilers.
   http://members.aol.com/autismuk/emu.html

Ira Goldklang's TRS-80 Revived Pages  
   This page deals with the TRS-80: Emulators, Software, and Orch-80/85/90.
   http://www.trs-80.com/

TRS-80 & Tandy Files  
   Maintained by Guy Omer. Resource library for PC, CoCo, Tandy Model 100 and TRS-80.
   http://www.8n1.com

nitros9.stg.net  
   Yet another Coco 1/2/3 set of web pages by L. Curtis Boyle.
   http://nitros9.stg.net/

Trs-80 main page in The Netherlands by Gordon Rahman.  
   TRS-80 website with a NEWDOS80 DSDD emulator. Tools to transfer TRS-80 floppies to the PC.
   http://home.planet.nl/~srahman

Tand-Em  
   PCjr and Tandy 1000 emulator for 80386 (or higher)-based PCs.
   http://www.oldskool.org/pc/tand-em/

xtrs  
   An open source TRS-80 Model I/III/4 emulator for Unix.
   http://www.tim-mann.org/xtrs.html

Virtual T  
   An open source TRS-80 Model 100/102/200 emulator for Linux, MacOS X, and Windows.
   http://sourceforge.net/projects/virtualt/