https://gogoanime.nl/watch/when-they-cry.41xo (2006)
https://gogoanime.nl/watch/when-they-cry-kai.jjz2 (2007)
https://gogoanime.nl/watch/when-they-cry-rei.z1x3 (2009) [Optional first episode]
https://gogoanime.nl/watch/higurashi-when-they-cry-gou.zm6l (2020)
https://gogoanime.nl/watch/higurashi-when-they-cry-sotsu.7446 (2021)
https://mangaowl.to/comic/umineko-no-naku-koro-ni-episode-1-legend-of-the-golden-witch
https://mangaowl.to/comic/umineko-no-naku-koro-ni-episode-2-turn-of-the-golden-witch
https://mangaowl.to/comic/umineko-no-naku-koro-ni-episode-3-banquet-of-the-golden-witch
https://mangaowl.to/comic/umineko-no-naku-koro-ni-episode-4-alliance-of-the-golden-witch
https://mangaowl.to/comic/umineko-no-naku-koro-ni-chiru-episode-5-end-of-the-golden-witch
https://mangaowl.to/comic/umineko-no-naku-koro-ni-chiru-episode-6-dawn-of-the-golden-witch
https://mangaowl.to/comic/umineko-no-naku-koro-ni-chiru-episode-7-requiem-of-the-golden-witch
https://mangaowl.to/comic/umineko-no-naku-koro-ni-chiru-episode-8-twilight-of-the-golden-witch
https://gogoanime.nl/watch/higurashi-no-naku-koro-ni-nekogoroshi-hen.0rq7
https://gogoanime.nl/watch/higurashi-no-naku-koro-ni-kaku-outbreak.7897
https://gogoanime.nl/watch/higurashi-no-naku-koro-ni-kai-specials.8jwv/ep-1
https://gogoanime.nl/watch/higurashi-no-naku-koro-ni-kira.ykv0 [Don't watch this one. It's weird.]
I recommend to use the 07th Mod on Higurashi and Umineko, but Umineko has a separate mod named The Umineko Project.
https://steamunlocked.net/higurashi-when-they-cry-hou-chapter-1-onikakushi-free-download/
https://steamunlocked.net/higurashi-when-they-cry-hou-ch-2-watanagashi-free-download/
https://steamunlocked.net/higurashi-when-they-cry-hou-ch-3-tatarigoroshi-free-download/
https://steamunlocked.net/higurashi-when-they-cry-hou-ch-4-himatsubushi-free-download/
https://steamunlocked.net/higurashi-when-they-cry-hou-ch-5-meakashi-free-download/
https://steamunlocked.net/higurashi-when-they-cry-hou-ch-6-tsumihoroboshi-free-download/
https://steamunlocked.net/higurashi-when-they-cry-hou-ch-7-minagoroshi-free-download/
https://steamunlocked.net/higurashi-when-they-cry-hou-ch-8-matsuribayashi-free-download/
https://steamunlocked.net/higurashi-when-they-cry-hou-rei-free-download/
https://steamunlocked.net/umineko-when-they-cry-question-arcs-free-download/
https://steamunlocked.net/umineko-when-they-cry-answer-arcs-free-download/
https://steamunlocked.net/ciconia-when-they-cry-phase-1-for-you-the-replaceable-ones-free-download/
https://07th-mod.com/home/
https://umineko-project.org/en/downloads/