magmi
There are 4 repositories under magmi topic.
macopedia/magmi-m2
Magmi GitHub, see branch magento2 for a version compatible with Magento 2
bpodwinski/magmi-git
Magmi Bootstrap
lsv/magento2-magmi-datapump
Using magmi2 with object oriented code to import products in magento2
lsv/magento2-magmi-datapump-magento-module
Using Magmi2 to import products