There appear to be a number of devs/companies working on additional and alternative clients and apps to accompany the rM, as well as pieces of software that can be run on the rM.

A curated list of projects regarding the reMarkable paper tablet is available on the awesome page of the reHackable group on GitHub.

Here are some examples below:

• reMarkable Connection Utility (RCU): A (paid) cross-platform client for all-in-one offline management of backups, screenshots, notebooks, templates, wallpaper, and third-party software
• Slithin: A free cross platform management client for backup, notebook, template and screens. With internal tools create and edit notebooks

• https://www.remarkable.app/ (paid)

• remt Note-taking support tool for reMarkable tablet.
• maxio rM2svg and exportNotebook scripts.
• reHackable scripts especially repush and repull scripts to send/recieve files to/from the rMarkable.

• Draft is a launcher for programs on the tablet. It can launch the default xochitl software, but also fingerterm, or alternative readers, like Plato (see below).
• Oxide a launcher for programs on the tablet that was based on Draft. It is compatible with draft, but has more built in features.
• remux a launcher for the remarkable that works side by side with your apps.

• Fingerterm is a terminal emulator designed for touch based interaction.
• Yaft yet another framebuffer terminal.

• Plato, an alternative reader initially written for the Kobo e-reader has been ported to the reMarkable tablet.
• KOReader a document viewer for E Ink devices.