Kik
Description: Kik is a free instant messaging app for mobile devices that allows users to chat with friends using text, stickers, gifs, and more. It's especially popular among teenagers and known for its anonymity features.
Type: software
Listmonk
Description: Listmonk is an open-source newsletter and mailing list manager. It allows you to easily create, send, and manage email newsletters and mailing lists. Key features include subscriber management, email templates, A/B testing, analytics, and integration with services like Mailchimp.
Type: software
Pricing: Open Source