Both netori and netorase are in scope of this thread, even though normal NTR (or BSS) is generally the topic for obvious reasons.
Aisai Nikki [JPN], one of the best and Sanae is super, super hot (multiple endings) -
https://vndb.org/v8280
Rikai Aru Okusan to no Icha Love Netorase Seikatsu [JPN] aka "Lovey Cuckoldry Play with an Understanding Wife", IMO best pure netorase title if ignoring the numerous technical and art limitations -
https://vndb.org/v31404
Koukan no Toriko-tachi... [JPN], very strong swapping (true end) and smaller netorase route, and a somewhat mediocre NTR route that had a lot promise...on the precipice of a masterpiece that greatly falls short on execution -
https://vndb.org/v19220
Hitozuma Koukan Nikki [JPN], swapping but a large portion covers netorase -- slightly dated art but Kanako (MC's wife) 100% holds up and 1 of the endings is incredibly hot & creative -
https://vndb.org/v2896
Ore no Kanojo wa Taninbou, swinging game but scorching (small) netorase route -
https://vndb.org/v28126
Mijiishi, best to worst:
- Ruins of Luxoria - https://f95zone.to/threads/the-ruins-of-luxoria-final-mijiishi.48387/
- Amor Magical Academy - https://f95zone.to/threads/amor-magical-academy-v2-0a-mijiishi.1868/
- Alchemy Fantasy R - https://f95zone.to/threads/alchemy-fantasy-r-shes-a-baby-alchemist-v1-1-mijiishi.161100/
- Menimis [JPN] - https://www.dlsite.com/maniax/work/=/product_id/RJ127098.html
- Mercenary Band NTR - https://f95zone.to/threads/mercenary-band-ntr-v1-20-mijiishi.114016/
Fuufu Koukan [JPN] -
https://vndb.org/v29362
Boku to Kanojo no Midara na Utage [JPN], swapping-slash-netorase -
https://vndb.org/v26305
Yanzuma Koharu ~Omae no Yome wa Ore no Mono~, more NTR but it has some netorase elements and it veers into a shock ending that might be unpalatable (see sexual content spoilers)...it was unique, certainly, so it gets extra points for originality from me -
https://vndb.org/v7149
Personal reviews on most of these:
There are some others, but this list covers most of the notable ones. Technically, there's also
Boku ni Dakare Aegu Tsuma by ANIM that has an English translation / MTL, but I despise that title and don't recommend it.