For plug straight in jobs (not mappable) the most popular option is spoon, there's also the mugen n1 ecu and the other more rare jdm ones
If you want mappable then the most popular is hondata s300, this is essentially a modified oem ecu,
There's also the options of chipped ecus and tuning with the likes of Neptune and chrome, and also the other plug and plays like AEM and Apexi power fc
Your best option really is to speak to who ever will be doing the tuning and seeing what they prefer to work with