Just recently updated php project management system which gives the ability to users to add project notes on each project. This new update added a new section project notes where users are able to add note about the project. Remember anyone can add this project note, and all other members have access to project can see the notes.
This shows the Note title, when note was added and who added the note. When a note is created users can send Email to project members about note as well. Also a project log also get action and added on project note addition.