USB storage devices with hardware encryption and keypad. Capacities range from 4 GB to 6 TB.

V3 SNOWLeo SDR is a low-cost open source software defined radio platform based on Xilinx ZYNQ SoC and MYRIAD RF module. It include Giga Ethernet, USB OTG, HDMI, SDIO and USB-UART. SNOWLeo SDR is equipped an MYRIAD module that support 300MHz~3.8GHz, 28MHz BW application, such as WiFi, LTE or WiMax.

Lots of information about the PDP-11 microcomputer.

The OneRNG is a project to create a reliable and open hardware random number generator - one that can be verified by the user and can be trusted. See also http://onerng.info/

The Entropy Key is a small, unobtrusive and easily installed USB stick that generates high-quality random numbers, or entropy.
The Entropy Key contains two high-quality noise generators, and an ARM Cortex CPU that actively measures, checks and confirms all generated random numbers, before encrypting them and sending them to the server. It also actively detects attempts to corrupt or sway the device. It aims towards FIPS-140-2 Level 3 compliance with some elements of Level 4, including tamper-evidence, tamper-proofing, role-based authentication, and environmental attacks. If it detects that one of its two generators has failed, may be about to fail, or if it detects a physical attack, it will automatically shut down.
£36, but currently (Jan 2015) out of stock.

Intel-based laptop and Tablets trying to use only free software (including BIOS etc.).

The firmware for airspy will be released once it is cleaned up.

Teensy 3.1 is a small board with a ARM Cortex-M4 processor, USB interface and 34 I/Os. It includes a real time clock (crystal and battery have to be added).

This website describes PDP2011 – a re-creation of the well known series of PDP-11 computer systems in VHDL. Everything that is needed to run a complete PDP-11 system is included; you can run a complete Unibus PDP-11 system with console, disks and other peripherals on a simple low cost FPGA development board. The original V5-V7 versions of Unix, BSD 2.11, and the original DEC operating systems for the PDP-11 work.

Review of the Ham it Up Converter, an up-converter translating HF (approx. 0--50 MHz) to 100--150 MHz for use with SDR receivers.