I use my own not-yet-ready-for-release app called Noteworthy [1], but here is a list of some of the roamlikes I find most inspiring:
> Athens Research -- free and open source roam competitor made by someone who failed an interview for a job at roam :) -- https://github.com/athensresearch/athens
> Obsidian -- free but non-open wikilink system based on Markdown files -- https://obsidian.md/
> Athens Research -- free and open source roam competitor made by someone who failed an interview for a job at roam :) -- https://github.com/athensresearch/athens
> Obsidian -- free but non-open wikilink system based on Markdown files -- https://obsidian.md/
> Foam -- Markdown-based knowledge management system based entirely around VS Code extensions -- https://foambubble.github.io/foam/
> Neuron/Cerveau -- Markdown-based Zettelkasten and static site generator written in Haskell -- https://neuron.zettel.page/
Some other honorable mentions that I can't be bothered to dig up links for: Madoko, RemNote, Notion, TiddlyWiki, Cerveau, Zettlr, Notable
[1] https://github.com/benrbray/noteworthy