The best replacement for keytool is ikeyman.

The best alternatives to keytool are rated as following:
★★★★★  ikeyman
★★★  certutil
★★★  openssl

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

Other search terms related to keytool and their ratings are:
★★★★★ .pem
★★★★ private key
★ pem
You have in mind a companion for keytool and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of keytool in all years. Click on graph for more.
keytool
ikeyman
certutil