I was searching for lightweight collaboration suite (messaging and groupware) to manage some small websites and while searching around I found Citadel. Citadel is a complete and feature-rich open source groupware platform. Email, calendaring/scheduling, address books Bulletin boards, mailing list server, instant messaging Multiple domain support An intuitive, attractive AJAX-style web interface The Citadel system [...]
To taking my short notes so far I’ve always used Tomboy, it’s a good small software and in the past I choose it because it could sync notes on Ubuntu one, but this supported has been dropped some times ago, and from that date I started to search for something else and perhaps I’ve found it with springseed.
It helps you organise notes with a beautiful interface and syncs with Dropbox so you can keep your notes with you, wherever you are.