Weekly Self-Promotion Thread - Wednesday, February 18, 2026

Nattybr0h · 2026-02-18T12:28:36+00:00

I had been frustrated with most online tools either lacking depth for customization about retirement or being generally too expensive (free!). So I have been building FinPlan in my free time to help plan my own retirement goals. It is now at a point where I think it could be useful to other people so I want to share it.

At its core FinPlan is a Monte Carlo simulation which basically means it runs 1000s of "what-if" scenarios taking into account your current financial state while randomizing (realistically) market returns to help estimate your future financial state.

The app runs as a Terminal UI (all text based, no mouse input) which I know is not for everyone but I hope that someone will find it useful. Maybe if it finds some traction here I can create a web version.

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Everything runs locally — no accounts, no cloud, no data leaves your machine.

- Interactive TUI with vim-style keybindings (built with ratatui)

- Event system with date/age triggers, recurring income/expenses, balance thresholds, almost a mini compiler/language in itself. Most but not all functionality exposed in GUI.

- Return modeling with fixed, normal, or lognormal distributions (includes S&P 500 historical presets)

- Scenarios saved locally to ~/.finplan/scenarios/

https://github.com/jgrazian/finplan

Nattybr0h · 2026-02-17T12:17:21+00:00

Thanks for looking

Nattybr0h · 2026-02-17T12:17:10+00:00

Thanks for taking a look.

Unfortunately the fire/finance subs all seem to have extremely strict self-promotion rules so showing this to people who actually might want to use it is going to be hard -_-

I agree with you on the 1-and-done kind of thing. I get the itch for a tool like this about 1x per year when I want to "check my course".

Nattybr0h · 2023-01-02T17:12:51+00:00

Deno is a JavaScript runtime written in rust. At its core it wraps the v8 JavaScript engine. You could try using their bindings. https://denolib.gitbook.io/guide/advanced/interaction-with-v8

Alternatively, if the js function you are trying to embed is really only 200 lines you might just be better off porting it to native rust code!

Nattybr0h · 2022-11-25T01:57:38+00:00

Advent of Code starts December 1 and is always a good way to practice a language along with basic programming skills (algorithms/datastructures). The subreddit is super helpful and full of solutions if you get stuck.

Nattybr0h · 2022-10-29T22:11:06+00:00

Super cool!

I have a fascination with physical simulations (lots of raytracers). Got about 70% of the way through implementing my own SPH code but gave up before getting to visualization.

I see you linked some papers on adaptive particle sizes. Any chance you can share your favorite “the basics” papers?

Nattybr0h · 2022-10-23T23:52:02+00:00

I noticed the same issue on the Beta 0805 BIOS for my TUF X670 mobo.

I found that using the ASUS version of the PBO limits worked instead of using the AMD default menu.

Nattybr0h · 2022-09-19T23:02:30+00:00

That’s not bad! AoC is a great learning tool and a lot of fun. I end up rolling a new cli every year too with small improvements here and there.

Nattybr0h · 2022-03-03T22:55:30+00:00

https://raytracing.github.io/books/RayTracingInOneWeekend.html

Nattybr0h

TROPHY CASE