I'm working on the Obsidian plugin for building and rendering family graphs [1]. I started my own genealogy research in 2025 and did not want to store data on a 3rd-party platform. Obsidian was a great decision. The only thing I needed is a tree (graph) viewer for family members relationships (something like myheritage.com has). So, I built my own with a lot of interactivity on top.

[1] https://github.com/TheBestTvarynka/grafily

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Tree Drawing Using Reingold-Tilford Algorithm 6 months ago

Hi, there

About a month ago, I worked on a simple tree-drawing software. Existing explanations of the Reingold-Tilford algorithm confused me a lot. I decided to try to explain it by myself.

In my blog post, I really tried to cover every aspect and every step of the algorithm. Hope someone will find it useful.

If you have any ideas for improving my explanations, please share.

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Ask HN: What Are You Working On? (December 2025) 7 months ago

For the last 3 years, I have been working on a web tool to help me at work: debugging ASN1-encoded data (keys, certificates, Kerberos/CredSSP/SPNEGO/etc data structures, and more) and performing various cryptographic operations. This app is available online; you can try it [0] (no sign-in/up needed).

This December, I reached a huge milestone: I implemented ASN1 tree editing [1]. Now I can edit the ASN1 tree directly in the browser (read my blog post for more details: [2]).

I'm happy that I wrote this tool. I use it often to help me debug my protocol implementations and/or debugging. I know that some of my friends use the JWT debugger and ASN1 parser from this tool. Maybe some of you will find it helpful too.

[0] https://crypto.qkation.com/

[1] https://news.ycombinator.com/item?id=46255464

[2] https://tbt.qkation.com/posts/announcing-crypto-helper-0-16/

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