iamb is a Matrix client for the terminal that uses Vim keybindings. It
includes support for:

 o Threads, spaces, E2EE, and read receipts
 o Image previews in terminals that support it (sixels, Kitty, and
   iTerm2), or using pixelated blocks for those that don't
 o Notifications via terminal bell or desktop environment
 o Creating, joining, and leaving rooms
 o Sending and accepting room invitations
 o Editing, redacting, and reacting to messages
 o Custom keybindings
 o Multiple profiles