Search for a recipe and the results are often buried in personal blogs and video-only pages. Recigle searches only curated recipe sources and leaves out amateur blogs and video sites, so what you get is a list of proper written recipes, each linking to its original site. No account, and it installs to your phone for use in the kitchen. Japanese-focused. Free and open source.
Limit Shiritori Party! is a Japanese word-chain party game played against the clock. Shiritori Timer runs the per-turn countdown in the browser, with party and expert rule sets, audio cues you can switch off, and big buttons you can tap from across the table. Prop a phone or tablet in the middle and play. Installs as a PWA. In Japanese. Free and open source.
Omocoro and Daily Portal Z are two well-loved Japanese humor sites, and fans of one often read the other. This unofficial reader merges their new articles into a single feed grouped by date, with each article's tags, and links to the official site to read it. A dark, text-first layout that loads quickly on a phone and installs as a PWA. In Japanese. Free and open source.