The best replacement for adb is fastboot.

The best alternatives to adb are rated as following:
★★★★★  fastboot
★★★★★  xmlbeans
★  jaxb
★  jibx
★  jdbc

Your alternative for adb is not listed? Suggest!
Speaking about adb, one probably shouldn't forget about root.

Other search terms related to adb and their ratings are:
★★★★★ root
★★★★★ sdk
★★★★ sideload
★★★★ usb debugging
★★★ fastboot
★★★ root access
★★ android sdk
★★ sdk download
★★ cwm
★★ twrp
★ clockworkmod
★ linux
★ having to download the sdk
You have in mind a companion for adb and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of adb in all years. Click on graph for more.
adb
fastboot
xmlbeans