OLIMEXINO-2560 is Arduino Mega2560 like board which keeps ports conversion but adds UEXT connector to connect our wide range of modules and sensors, works on 5V and 3.3V, and has on board micro SD card for file storage and logging.
Power supply uses DCDC convertor with input range 6-15VDC when OLIMEXINO-2560 works on 5V and 5-15VDC when OLIMEXINO-2560 works on 3.3V.
olimex 
Jun 21, 2019 @ 16:21:23
Looks interesting !… Do you have a price for it yet ?
Jun 21, 2019 @ 16:32:02
yes the price is EUR is between 11.96 and 14.95 depend on quantity https://www.olimex.com/Products/Duino/AVR/OLIMEXINO-2560/open-source-hardware
Jun 21, 2019 @ 23:28:15
You failed to mention here that it is “Industrial grade -45+85C”, which may also be a major selling point 😉
Jun 22, 2019 @ 07:14:16
Nice to see all the MCU pins being brought out to “headers”. Overall form factor is amenable to use in compact enclosures. Temperature range is good.
Those who run larger applications might want to expand the available RAM for e.g. FreeRTOS to run comfortably but there appears to be no VCC in line with the AD* or _WR, _OE and ALE pin rows frustrating the use of a simple, vertical SRAM board with SRAM and address latch chips between the rows of headers. SRAM can be expanded easily to 32 or 64 kilobytes. [You’ll never need more than 68 kilobytes. 😉 ]
Maybe next board rev.
Yes; one can run low on on-chip SRAM; especially when driving a display and e.g. an IR remote control; even when all the significant “text” is in PROGMEM. On top of 20+ other threads to monitor conditions (via analog and digital sensors) and to operate steppers and PWM outputs.