NAPS2 (Not Another PDF Scanner 2)
This is the Linux app named NAPS2 (Not Another PDF Scanner 2) whose latest release can be downloaded as naps2-6.1.2-setup.exe. It can be run online in the free hosting provider OnWorks for workstations.
Ghostscript
This is the Linux app named Ghostscript whose latest release can be downloaded as ghostscript-9.09.tar.gz. It can be run online in the free hosting provider OnWorks for workstations.
BeeBEEP (Free Office Messenger)
This is the Linux app named BeeBEEP (Free Office Messenger) whose latest release can be downloaded as beebeep-code-5.6.8.zip. It can be run online in the free hosting provider OnWorks for workstations.