I am re-designing my website. Currently it is a mix of the old and the new so please bear with me.
The old site is linked in the header menu "Other Designs".
Most of my designs (both hardware and software) are based on the P8X32A Propeller microprocessor chip by Parallax Inc. This micro has 8x 32-bit RISC processor cores, each running at 80MHz although I usually overclock up to 104MHz. All cores (called cogs) have their own dedicated 2KB RAM (512 x 32-bits) register/memory/program space, counters, etc. They also share a common memory space (called hub memory) of 32KB SRAM and 32KB ROM.
The Propeller chip (affectionately called the "Prop" by many) has no built-in peripherals as is usually found in other micros. Rather, it has an extremely powerful set of counters, etc, that, together with code in 1 or more cores (each processor core is called a cog), effectively "bit-bang" the I/O pins to emulate those peripherals. This way, a variety of extremely intelligent peripherals can be built. Many peripherals/drivers are available as Objects and published for general "free" use.
The Propeller has 32 I/Os. All I/Os are available to each core and all are identical, so I/O pins are not fixed as is normal on other micros. This chip is so flexible that you could have 16 UARTs, or VGA and 8 UARTs plus Composite video and a PS2 Keyboard and PS2 Mouse and a microSD and sound. Therefore there is no requirement for a family of chips.
It is 3V3 and uses an external 32KB EEPROM (or larger) to store user code or it can be downloaded from a simple serial (usually USB based) interface (often called a PropPlug).