The NBO plugins are now officially released, including source.
The No Budget Orchestra plugins are the sections of an entire, classical orchestra in LV2 format. They do not need to be loaded into any kind of sfz player such as LinuxSampler. They have their own, highly optimized, very low resource player built-in, that uses compressed waveforms and shared libraries to make the orchestra usable even on machines with very limited RAM.
The initial graphical installer of the previous test version is gone. The new installer needs to be run from a terminal window, using sudo (or an administration account). This eliminates the problems some folks had with the previous version. (Also, the bug that Mike reported about the "All users" install not working has been fixed.) The new installer now offers the choice of installing its existing binaries (which are compiled on an old Core2 64-bit cpu, with a standard version of Debian, to ensure that they run on just about every computer within the past 15 years), or compiling the plugin source code to create new binaries optimized for your computer. With the latter choice, you can't get a more efficient orchestra plugin than this. If your distro uses Debian's apt, Fedora's dnf, or Arch's pacman, the installer will attempt to completely automate the process of compiling and installing your optimized plugins.
There is also an uninstall utility to remove all the files the installer installs. (Folks who installed the test version, should first run uninstall_orchestra.sh to clean out all old files, including any botched installation). Read "install_nbo.htm" for details about the installer.