Simtel was once a vast archive of freeware and shareware programs for different operating systems, including DOS. Unfortunately, Simtel shut down in 2013, and DOS users everywhere lost access to this great resource. Now, FreeDOS fan Michael Babcock has recreated the Simtel DOS shareware site by posting copies of Simtel archive CDs on a website. You can access it at simtel.site.
sadly this site has now disappeared too
A brief bit of sleuthing found the Simtel CD archived at:
https://archive.org/download/simtelnet_bu_mirror_2013_04
The 1st entry appears to be the complete CD