There are allot of Q's about the losses of data, and how to recover them.
- Installed Ubuntu and accidently gave all the hard disk space to Ubuntu
- HDD recovery tool
- Tool for File Recover | Deleted Files Recovery
- What are the best Recovery softwares for ubuntu 12.04?
And many more
My suggestion would be to close them and have only 2 question's:
Q: What recovery tools exist for (Linux)Ubuntu???
Per answer a recovery tool with some detailed explanations about the tool itself.
Q: How to recover my data?
With per answers covering different scenarios.
Recover data from {filesystem
} under Ubuntu using {recovery-tool
}?