Castle - The easiest way to protect your users from getting hacked
Winds - Open source & beautiful RSS reader
Mail Dump - Powerful Extensions for email addresses extracting, verifying and finding
Reeder - Reeder is an RSS reader and client for multiple services.
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
Notion Feeder - Get rid of all the Feedreader apps and use Notion as a Feed Reader.