Is there a good cross-platform software in which you can store contacts (phone numbers, mails etc.)?
- It is essential to be at least compatible with Linux.
- It can be web-based although it is not a requirement
- I want it to be free.
- I need it for basic handling of the contacts i.e. just storing them and searching them effectively.
- Plus features would be if it is opensource and if it can sync the contacts between desktops and phones.