Make it clear that other docs are planned

README.md

-# OpenOCD
+# Tools
 
-[OpenOCD](http://openocd.org/) is a tool for on-chip debugging. It's also a great tool just for
-flashing programs and bootloaders.
+This repo is intended to document software tools that are used across multiple microcontrollers.
 
-## Installation
+Underway:
 
-### Package Managers
+- [OpenOCD](openocd)
 
-On Linux, TODO.
+Planned:
 
-On Mac, using [Homebrew](https://brew.sh/): `brew install openocd`.
-
-On Windows, there is no package manager. Untested: there are binaries
-[here](https://gnutoolchains.com/arm-eabi/openocd/).
-
-### From Source
-
-*This section is for Linux and Mac only*
-
-If you want to know exactly which version you're using, or you're going for maximum bare metal cred,
-you can build from source. This can be helpful if you'll be developing between different operating
-systems — one less thing that could be different — or if the package available on your
-system is out of date.
-
-The official [git repo](https://sourceforge.net/p/openocd/code/ci/master/tree/)
-is on SourceForge.
-
-```git clone https://git.code.sf.net/p/openocd/code openocd-code```
-
-To build it, you'll need `gcc` or `clang`, as well as `make`, `libtool`, `pkg-config` version 0.23
-or greater, and possibly others detailed [here](http://openocd.org/doc-release/README). Once you
-have the prereqs, building is a standard process. Just note that you need to enable cmsis-dap, which is the protocol your computer will use to communicate with an ATMEL ICE debugger.
-
-```
-./bootstrap
-./configure --enable-cmsis-dap
-make
-make install
-```
-
-## Basic Use
-
-### Config files
-
-When OpenOCD starts, it first processes some configuration commands. You can specify a specific
-config file with `openocd -f path/to/your/config.cfg`, or by default it looks for `openocd.cfg`. At a minimum, OpenOCD needs to know how to communicate with the
-programming/debug tool you're using (e.g. ATMEL ICE), and what microcontroller you're using. For
-ATMEL ICE, we want `cmsis-dap`. (You can read more about what this means
-[here](https://electronics.stackexchange.com/questions/405134/swdap-vs-cmsis-dap-vs-daplink).)
+- Arduino (with support for boards we've flashed)
+- PlatformIO
+- gdb

openocd/README.md

+# OpenOCD
+
+[OpenOCD](http://openocd.org/) is a tool for on-chip debugging. It's also a great tool just for
+flashing programs and bootloaders.
+
+## Installation
+
+### Package Managers
+
+On Linux, TODO.
+
+On Mac, using [Homebrew](https://brew.sh/): `brew install openocd`.
+
+On Windows, there is no package manager. Untested: there are binaries
+[here](https://gnutoolchains.com/arm-eabi/openocd/).
+
+### From Source
+
+*This section is for Linux and Mac only*
+
+If you want to know exactly which version you're using, or you're going for maximum bare metal cred,
+you can build from source. This can be helpful if you'll be developing between different operating
+systems — one less thing that could be different — or if the package available on your
+system is out of date.
+
+The official [git repo](https://sourceforge.net/p/openocd/code/ci/master/tree/)
+is on SourceForge.
+
+```git clone https://git.code.sf.net/p/openocd/code openocd-code```
+
+To build it, you'll need `gcc` or `clang`, as well as `make`, `libtool`, `pkg-config` version 0.23
+or greater, and possibly others detailed [here](http://openocd.org/doc-release/README). Once you
+have the prereqs, building is a standard process. Just note that you need to enable cmsis-dap, which is the protocol your computer will use to communicate with an ATMEL ICE debugger.
+
+```
+./bootstrap
+./configure --enable-cmsis-dap
+make
+make install
+```
+
+## Basic Use
+
+### Config files
+
+When OpenOCD starts, it first processes some configuration commands. You can specify a specific
+config file with `openocd -f path/to/your/config.cfg`, or by default it looks for `openocd.cfg`. At a minimum, OpenOCD needs to know how to communicate with the
+programming/debug tool you're using (e.g. ATMEL ICE), and what microcontroller you're using. For
+ATMEL ICE, we want `cmsis-dap`. (You can read more about what this means
+[here](https://electronics.stackexchange.com/questions/405134/swdap-vs-cmsis-dap-vs-daplink).)