OptinMonster - OptinMonster helps to convert abandoning website visitors into subscribers and customers.
Phantombuster - A marketplace of simple to use no-code APIs
Sumo - Free tools to grow your email list.
Evaboot - LinkedIn sales navigator without the bad results
Hello Bar - Hello Bar, the simplest way to grow your email list. Have your opt-in live in minutes. No developer required.
Wiza - Create email lists from Linkedin Sales Navigator