ImageMagick - Mastering Digital Image Alchemy
Source-code: https://github.com/imagemagick/imagemagick
Nano Editor
GNU nano is a small editor for on the terminal. It supports syntax highlighting, spell checking, justifying, completion, undo/redo...
nb · command line and local web plain text note-taking
Source-code: https://github.com/xwmx/nb
Rclone
Rclone syncs your files to cloud storage: Google Drive, S3, Swift, Dropbox, Google Cloud Storage, Azure, Box and many more.