RESET signal to multiple ICs
For the two logic voltages, add a level translator from 1.8 to 3.3 or from 3.3 to 1.8. For example, the SN74LVC1T45.

Add a supervisor if you need supervisory functions (such as analog brownout detect and timer). Some chips have a mechanical switch input. 

You will still need the level translator. 

You may need two supervisor chips (possibly) plus some logic if you have to reliably reset parts in both power domains under all conditions- for example, if the supervisor is running from the 3.3V supply and the 1.8V supply glitches it may not catch it, or vice versa. It may or may not be necessary to reset the parts on the other domain if a reset takes place on the opposite domain. That's a system-level design issue.