Install Balsamiq for ubuntu

gistfile1.txt

helpfull links

(1) https://gist.github.com/cbednarski/5379830
(2) http://www.clarifylinux.org/2012/04/ubuntu-1204-tweak-and-hack-round-up.html
(3) http://jeffhendricks.net/?p=68
(4) BEST for 64 bit http://www.randomhacks.co.uk/how-to-install-balsamiq-mockups-on-ubuntu-13-10/

The steps I did
RUN>>
locate libgnome-keyring.so /usr/lib/i386-linux-gnu/libgnome-keyring.so.0 /usr/lib/i386-linux-gnu/libgnome-keyring.so.0.2.0

FOUND as>>>
/usr/lib/i386-linux-gnu/libgnome-keyring.so.0
/usr/lib/i386-linux-gnu/libgnome-keyring.so.0.2.0

TEN RUN Symlink>>
sudo ln -s /usr/lib/i386-linux-gnu/libgnome-keyring.so.0 /usr/lib/libgnome-keyring.so.0 
sudo ln -s /usr/lib/i386-linux-gnu/libgnome-keyring.so.0.2.0 /usr/lib/libgnome-keyring.so.0.2.0

FOR 64 bit use
sudo ln -s /usr/lib/x86_64-linux-gnu/libgnome-keyring.so.0.2.0   /usr/lib/libgnome-keyring.so.0.2.0
sudo ln -s /usr/lib/x86_64-linux-gnu/libgnome-keyring.so.0 /usr/lib/libgnome-keyring.so.0

DOWNLOAD Air and install>>
http://airdownload.adobe.com/air/lin/download/2.6/AdobeAIRInstaller.bin
sudo chmod +x ./AdobeAIRInstaller.bin
sudo ./AdobeAIRInstaller.bin

[Adobe AIR could not be installed. Install either Gnome Keyring or KDE KWallet before installing Adobe AIR.]

"error while loading shared libraries: libgtk-x11-2.0.so.0: cannot open shared object file: No such file or directory"
So, you will need to install the 32bit libs:

sudo apt-get install libgtk2.0-0:i386 libnss3-1d:i386 libnspr4-0d:i386 lib32nss-mdns libxml2:i386 libxslt1.1:i386

DOWNLOAD for 32 or 64bit>>
http://builds.balsamiq.com/b/mockups-desktop/MockupsForDesktop32bit.deb
http://builds.balsamiq.com/b/mockups-desktop/MockupsForDesktop64bit.deb

RUN Install>>
sudo dpkg -i ./MockupsForDesktop32bit.deb
>> UI Installer will complete without errors
>> launch app from app search/launcher as balsamiq

the .deb file is no longer available at that url.

However, Mockups 3 is installable via wine (confirmed w/ wine v 1.6.2 in Ubuntu 15.10):

wget https://builds.balsamiq.com/mockups-desktop/Balsamiq_Mockups_3.3.5_bundled.zip -O balsamiq.zip
unzip balsamiq.zip
cd Balsamiq_Mockups_3
wine Balsamiq\ Mockups\ 3.exe

Last available builds for Balsamiq .deb file:

32 bits: https://build_archives.s3.amazonaws.com/mockups-desktop/2.2/MockupsForDesktop32bit2.2.24-2014.11.06.deb
64 bits: https://build_archives.s3.amazonaws.com/mockups-desktop/2.2/MockupsForDesktop64bit2.2.24-2014.11.06.deb

@brandonmp method worked. Now the latest v3 bundle is in

https://balsamiq.com/wireframes/desktop/archives/?prefix=obsolete/mockups-desktop/3.5.17/