What are some alternatives?
When comparing kitefaster.com Deep Sleep Sounds and Office 365, you can also consider the following products
A Soft Murmur - Ambient sounds to wash away distraction.
Google Drive - Access and sync your files anywhere
Noizio - Feeling that the noise of the big city is too much for you to bear?
LibreOffice - Free office suite, open source, and compatible with .doc, .docx, .xls, .xlsx, .ppt, .pptx files. Updated regularly – download for free. Originally based on OpenOffice.org.
Rainy Mood - Rainy Mood is the world's most popular rain simulator. Sleep, study, and relax with the sound of rain.
ONLYOFFICE - ONLYOFFICE is a complete office and productivity suite.