MyAbandonware - This site has a very extensive collection of PC-98 games for download.
NeoKobe on Archive.org - A large collection of PC-98 games with a torrent for downloading.
PC98 Games Screenshot Project - Probably the most authoritative listing of PC-98 screenshots. Now that Ben has returned and filled most of it
out, it's a great guide for identifying games.
NEC PC-9801: Database - Nice database of games with screenshots, in japanese.
JRK's RPG site features RPGs and reviews for almost every platform imaginable, including the
PC-98 and PC-88. Text is in Polish, however.
AL32Gabby's PC-98 Page is a Russian page devoted to the system. Text is in both Russian and English, although
some menus are Russian only. He has a game list if you wish to trade games with him. (Site partially broken)
Sutorippu has reviews of a wide variety of adult games, including those for the PC-98 and PC-88.
Sogna Digital Museum is a site devoted to the now-defunct hentai game maker Sogna, which released most of their titles for the PC-98 as well as the standard PC.
/v/'s Recommended List which shows some games to play, and some screenshots and general descriptions.
The Old School Emulation Center (TOSEC) is a retrocomputing initiative dedicated to the cataloging and preservation of software, firmware and resources for arcade machines, microcomputers, minicomputers and video game consoles.
ADVGAMER blog contains lots of reviews of Adventure Games (In Japanese) for the PC-98.
DosBox-X is a fork of DosBox which aims to emulate a broader range of DOS computers, including the PC-98 series.
SL9821 is one of the newer (2016) emulators to be developed for the PC-98.
FMV Forums are easily the best English (in the language, not the nationality sense) forums for discussing
PC-98 games and issues with people from around the world.
/r/PC98 on Reddit A small subreddit dedicated to the PC-98.
NEC PC-9801/9821 Development Tools contains lots of information and downloads on compiling programs for the PC-98, including compilers and a great deal of reference material.
All links checked 6/6/2021