Simple Tab Groups - Create, modify and quick change tab groups. Features:

island - a free and opensource alternative to parellel space

Firefox Multi-account Containers - Sign in to two different accounts on the same site

App Cloner - Clone your Android apps so you can use multiple logins.

Panorama View - Tab Groups with Panorama View. Lets you easily Group and manage Tabs visually, with tab hiding.

Parallel Space - Parallel Space – Multiple accounts and Two-Face is free to use mobile app that helps you clone or run multiple accounts of the same app simultaneously, and use themes to style your unique space.