• Pdf Viewer Plus - simple PDF viewer
• quickDic - offline dictionary
• App Manager - full-featured package manager and viewer
• Librera PRO - All-Format eBook Reader
• K-9 Mail - Full-featured email client
• obsqr - fastest and most lightweight qr code reader
• Kernel Adiutor - Manage kernel parameters
• Metro - Best material design music player

I use OctoDroid: https://f-droid.org/en/packages/com.gh4a

why telegram is not blocked? makes you think…

and eventually gave up

or maybe they came to an agreement on mutually beneficial terms