Capture contains information about the "capture" side of the ChipWhisperer hardware. These devices, such as the ChipWhisperer-Lite and ChipWhisperer-Pro, are the part of the hardware actually performing the side-channel attacks. For example, they can measure power consumption, allowing you to recover an encryption key, or insert voltage glitches to cause mayhem on an embedded device.
Not sure about the differences between capture hardware? We've got a capture hardware comparison.
Targets contains information about the "target" side of the ChipWhisperer hardware, which are the devices that you're trying to research attacks on. These boards make hardware setup much easier compared to boards not designed for side channel research, such as development boards.
Like with the capture hardware, we've also got a target comparison page
ChipSHOUTER is a platform for researching electromagnetic fault injection, which uses intense electromagnetic fields to disrupt a target's operation, providing a less invasive way to perform glitch attacks compared to the voltage and clock glitching of the ChipWhisperer. This directory has documentation for both the ChipSHOUTER, as well as associated targets designed specifically for exploring electromagnetic fault injection.
This directory contains information on tools that offer new directions for research and help you extend your attacks to different platforms. For example, the PhyWhisperer is a device that allows you sniff and trigger based on USB data. Other examples include an H-Field probe for doing non-invasive power analysis and analog filters for improving the data that you collect from power analysis.
NewAE sells much of its hardware bundled together in different kits. This directory contains information on these bundles.
If you are interested in how to get started in Side-Channel Power Analysis & Fault Injection, check out some of the "Starter Kits" that include required hardware. Again, we've got a comparison page for the different starter kits.