Added a section for plugins

README.md

@@ -27,7 +27,12 @@ A few tutorials have already been written to help people write plugins in Lua. S
 - [2n.pl - How to write neovim plugins in Lua](https://www.2n.pl/blog/how-to-write-neovim-plugins-in-lua.md)
 - [2n.pl - How to make UI for neovim plugins in Lua](https://www.2n.pl/blog/how-to-make-ui-for-neovim-plugins-in-lua)
 - [ms-jpq - Neovim Async Tutorial](https://ms-jpq.github.io/neovim-async-tutorial/)
-- [Vimpeccable - Plugin to help write your .vimrc in Lua](https://github.com/svermeulen/vimpeccable)
+
+### Companion plugins
+
+- [Vimpeccable](https://github.com/svermeulen/vimpeccable) - Plugin to help write your .vimrc in Lua
+- [plenary.nvim](https://github.com/nvim-lua/plenary.nvim) - All the lua functions I don't want to write twice
+- [popup.nvim](https://github.com/nvim-lua/popup.nvim) - An implementation of the Popup API from vim in Neovim
 
 ## Where to put Lua files