As of 23 Oct 2021

ANTs: ANTs.zip compiled on 16 Mar 2021
Matlab R2017a Runtime: MCR_R2017a_glnxa64_installer.zip
Matlab R2018b Runtime: MCR_R2018b_glnxa64_installer.zip
ROBEX: ROBEXv12.linux64.tar.gz
Slicer: Slicer-4.11.20210226-linux-amd64.tar.gz
ALIZA: aliza_1.98.47.1.deb (for 18.04)
ALIZA: aliza_1.98.47.2.deb (for 20.04)
c3d: c3d-1.0.0-Linux-x86_64.tar.gz
CONN17f standalone: conn17f_glnxa64.zip
CONN18a standalone: conn18a_glnxa64.zip compiled on 15 Sep 2018
CONN18b standalone: conn18b_glnxa64.zip 
CONN19c standalone: conn19c_glnxa64.zip 
CONN20b standalone: conn20b_glnxa64.zip compiled on 09 Aug 2021
DSI Studio:
  dsi_studio_ubuntu_18.04.zip
  dsi_studio_ubuntu_20.04.zip
  dsistudio1604.zip compiled on 16 Aug 2018
fslinstaller.py: distributed on 12 Oct 2021 by Paul Mccarthy on FSL-ML
fsl-6.0.5.2.zip: zip of /usr/local/fsl generated on 04 Jun 2022
HCP_workbench: workbench-linux64-v1.4.2
itksnap: itksnap-3.8.0-20190612-Linux-x86_64.tar.gz
MRIcron: MRIcron_linux.zip (2019-09-02)
MRtrix3: mrtrix3.zip (vesion 3.0.3-27-gb8de292c from mrconvert -version)
Mango: mango_unix.zip (Version 4.1 24-Mar-2019)
MRIcroGL: MRIcroGL_linux.zip (06-Oct-2021)
Surf-Ice: surfice_linux.zip (2-Nov-2020)
SPM12 standalone: spm12_standalone.zip compiled on 27 Sep 2020
Tutorial by Chris Rorden: tutorial.zip (Downloaded on 06 Feb 2021 from 
http://people.cas.sc.edu/rorden/SW/tutorial/tutorial.zip)

These are stored locally on Dropbox/l4nsoftware
Remote files are located on http://www.lin4neuro.net/lin4neuro/neuroimaging_software_packages/