I couldn't find a comprehensive list of links for the RC2014 so I started one. Suggestions welcome.
- RC2014 Website - descriptions of all official RC2014 boards
- RC2014 Github Repo - official ROMs and example code
- RC2014 CP/M Guide - guide to setting up CP/M on the RC2014
- Decoding RC2014 ROM Labels - explanation of what RC2014 ROM labels mean
- RC2014 Module Template - Kicad template for building RC2014 boards
- RC2014 Port Spreadsheet - List of I/O ports for RC2014
- Grant Searle's Z80 Computer - The basis for the original RC2014
- Grant Searle's CP/M Machine - The basis for the RC2014 CP/M expansion
- YM2149 Sound Card - Sound card utilizing Yamaha YM2149 or GI AY-3-8910
- z80ctrl - AVR-based bootloader and I/O board for RC2014
- rc9918 - Work-in-progress TMS9918 video card
- Scott Baker's Blog - Lots of RC2014 boards (and other electronic projects)
- RC2014 Board List - List of all known boards for RC2014
- Small Computer Monitor - Nice monitor program for RC2014
- FoxHollow CP/M Archive - Small collection of CP/M software packages for the RC2014
- PT2/3 Command-line Player - CP/M utility for playing PT2/3 files on YM2149 sound card
- Marco Maccaferri's Software - RC2014 software written by Marco Maccaferri, including 2048 tile-merging game
- RC2014 Google Group - discussion of all things RC2014
- comp.os.cpm - broader discussion of CP/M
- Z80 CPU User Manual - Covers hardware interfacing, timing, and instruction set of the Z80
- Z80 Peripherals Manual - Covers Z80 peripheral chips from Zilog, including SIO/2 chip used in the RC2014
- Programming the Z80 by Rodnay Zaks - highly regarded book about Z80 assembly programming
- Z80 Assembly Language Programming by Lance Leventhal - another good Z80 assembly book
- CP/M 2.2 Manual - HTML manual for using CP/M and included utilities (DDT, ASM, etc.)
- The Programmer's CP/M Handbook by Andy Johnson-Laird - advanced book on CP/M programming
- CP/M Assembly Language Programming by Ken Barbier - more beginner oriented
- CP/M Assembler Collection - curated list of assemblers and debuggers for CP/M with downloads and documentation
- Humongous CP/M Archive - Huge collection of CP/M software
- Microsoft BASIC-80 Reference Manual - reference manual for MBASIC.COM
- Retrobrew Computers - Wider community of homebrew computers
- RomWBW - ROM-based CP/M implementation compatible with RC2014