The Google Drive suite are a group of applications that are all directly integrated into Google Drive. The apps include Google Docs, Google Slides, Google Sheets, Google Photos, and Google Keep along with the actual Google Drive app itself.
These apps focus primarily on office use for documents, spreadsheets, and slideshows but also work for note taking, backing up your photos, and storing whatever file you can think of. The best part is that they’re all free unless you need more than 15GB of storage on Google Drive. Most people don’t. These are all great free Android apps.