1. HP PA-RISC. "Big RISC" of the mid 80s-90s. Now practically dead.
2. Intel 8051. 8-bit microcontroller which now is found as a core in countless SoCs long after Intel stopped making them. You probably own and use something every day which has an 8051 or 8051-core MCU in it.
The 8051 is a weird enough architecture, especially by modern standards, that having an upward-growing stack is barely even a footnote.
(Examples of its weirdness: it only has one general-purpose register; it has three address spaces, some of which are bank-switched; every register other than the program counter exists in memory; some memory locations are bit-addressable...)
2. Intel 8051. 8-bit microcontroller which now is found as a core in countless SoCs long after Intel stopped making them. You probably own and use something every day which has an 8051 or 8051-core MCU in it.