As you may know, Picty is an open-source photo manager designed around managing metadata and a lossless approach to image handling.
Among others, it has support for big photo collections from either local computer, camera or flickr, has support for Exif, IPTC and Xmp industry standard formats, it writes all the photo changes as metadata and keeps them in the picty collection cache until you save your metadata changes to files and has basic image editing features, folder view and multi-monitor support.
The latest version available is Picty r795, which is still under development.
For Ubuntu 15.10 Wily Werewolf, Ubuntu 15.04 Vivid Vervet, Ubuntu 14.04 Trusty Tahr, Linux Mint 17.x and Elementary OS 0.3 Freya, up to date packages are available via some third party PPA, so installing the software should be easy. All you need to do is add the PPA to your system, update the local repository index and install the picty package:
$ sudo add-apt-repository ppa:damien-moore/ppa
$ sudo apt-get update
$ sudo apt-get install picty
Optional, to remove picty, do:
$ sudo apt-get remove picty
For Arch Linux, Manjaro and derivative systems, Picty is available via AUR, so, in order to get it on your system, do:
$ sudo pacman -Sy yaourt
$ sudo yaourt picty
Optional, to remove Picty, do:
$ sudo yaourt -Rsn picty