I made working 64bit sfs versions of Sylpheed 3.7.0 and QuiteRSS 0.19.3
Tested and used extensively, working flawlessly in Fossapup64. Simply mount the sfs and entries are added to the Internet category of the puppy menu. Sylpheed is a lightweight, versatile email client, and QuiteRss is a news aggregator.
Sylpheed can be found here:
https://mega.nz/file/XShxAIzA#E4Hp41DPJ ... 9pMh3B0AQ0
QuiteRSS can be found here:
https://mega.nz/file/nPp0xD4Y#IM-4mdBe6 ... XWEuPJBPSo
md5 hash and other sfs files found here:
https://mega.nz/folder/reoShDjA#ONbUYMfog9J7AWe9RVe2Uw
Thanks to all who helped me with scripts, especially @mikeslr
Let me know if you try it, how it works in different puppy versions.