<p>On Windows NTFS there is a nice but mostly unused feature called 
"Alternate Data Streams" (ADS) which I recently used in a hobby-dev project.</p>

<p>On Mac HFS+ there is also a similarly nice but mostly unused feature called "named forks".</p>

<p>I am thinking of porting this project to Linux, but I do not know if any Filesystem on linux has such a feature?</p>

Most Linux file systems have
```
extended attributes
```
. I'm not familiar with NTFS streams, so I can't compare the two. Most file systems need to be mounted with flags to enable the extended attributes, so this may not work generically for anyone's system. They are usually abbreviated as
```
xattr
```
or
```
xattrs
```
.