F

finance

Stateless financial model behind Suno's pWatt solar-project valuations, published so any auditor, client or investor can reproduce the numbers Suno reports. Zero runtime dependencies. Apache-2.0.

Interactive model of U.S. federal debt service as a share of federal revenue, including how that revenue contracts under unemployment and inflation. Static site, no build step, with a weekly data pull from Treasury and BLS.

Apple Quant is a trading platform focused on algorithmic strategies.

HLE All-in-One: one self-hosted container for the whole household. Finance, health, meals, home care, travel, wiki, docs vault, files and photos, chat. TanStack Start + Bun + PostgreSQL. Apache-2.0.

A financial Tracking app Built on Next.js, firebase and netlify with Playwright for test automation

Budget management application

OpenMoneyBox is an application designed to manage small personal money budgets in the easiest way.

Shared finances, without the noise. SplitDuo is a lightweight, open-source, self-hosted expense splitting app for small groups / couples, housemates, travel companions, or anyone sharing costs. No subscription, no third-party servers, no data you don't control.

A focused alternative to Splitwise and Cospend, deployable in one docker compose up. Features settlement-aware balances that minimize transfers to settle up, alias mode for subgroup splitting, AI-powered receipt scanning with any OpenAI-compatible endpoint, expense attachments, mobile-first installable PWA, invite-by-email, TOTP 2FA with backup codes, CSV import/export (Splitwise, Cospend, native), per-group stats with charts, full i18n (English and Italian), and an admin panel — all in a single Docker container.

Vantor is a deterministic capital routing system that converts explicit user-defined financial intent into structured, rule-validated execution instructions. It uses AI solely as a natural language parser and enforces a strict no-withdrawal, no-inference architecture where all allocations, schedules, and transactions must be explicitly defined, validated, and executed through approved deposit-only financial rails. https://roxanneardary.com/vantor/

Soluna Finance OS is an open-source financial operating system that abstracts insured deposits across multiple financial institutions into a unified, AI-orchestrated vault layer. It enables continuous identity verification, automated insurance-compliant allocation, and multi-agent financial decisioning to optimize for safety, liquidity, and yield. Designed as a protocol rather than a product, it provides a programmable foundation for coordinated, transparent, and resilient capital movement across modern financial networks. https://roxanneardary.com/soluna-finance-os/

SharedRail is an open-source, federated payment infrastructure designed to enable secure, instant, and identity-based value transfer across currencies and borders. Built on a modular architecture with mandatory encryption, KYC, and AI-assisted human intent verification, SharedRail allows users and institutions to send and receive payments using verified email identities while maintaining full transparency, auditability, and compliance through open standards. https://roxanneardary.com/sharedrail/

Orvian is an AI-driven personal financial operating system that organizes money into intelligent, rule-based envelopes layered over existing bank accounts. It automates allocation across spending, savings, goals, and tax obligations while maintaining a non-custodial, ledger-based architecture. With built-in goal tracking, time-locked financial structures, and a governed tax envelope system, Orvian turns income into a structured, transparent, and AI-optimized financial flow. https://roxanneardary.com/orvian/

Nest Intelligence is an open source AI-powered home affordability platform that helps individuals understand what they can truly afford before purchasing a home. By analyzing income, assets, expenses, transportation costs, local housing data, property taxes, utilities, and lifestyle factors, Nest Intelligence provides a complete financial picture for sustainable homeownership. Built with a modular AGPL-3.0+ architecture, it delivers transparent, privacy-focused affordability guidance without relying on credit score inquiries. https://roxanneardary.com/nest-intelligence/

The storage for general purpose public information relating to the Cryptocurrency Advocate and its online representation.

LatticePay is an open-source, AGPL 3.0+ licensed payment infrastructure designed to enable secure, encrypted, and local-first commerce without surveillance or centralized control. It allows merchants and developers to accept and process payments through a modular, privacy-preserving protocol stack that supports offline operation, peer-to-peer networking, and pluggable payment rails. The system is built to ensure merchants retain full ownership of their transaction data while maintaining compatibility with modern financial systems. https://roxanneardary.com/latticepay/

Internal Credit is an AI-powered, modular financial platform that enables users to borrow against their own savings while continuing to earn returns on their deposited capital. Designed around self-collateralized lending, the platform allows account holders to access up to 70% of their account value, receive AI-guided financial insights, and preserve long-term wealth through a flexible, secure, and extensible banking architecture. https://roxanneardary.com/internal-credit/

TruthInBilling is an open-source, privacy-preserving platform that collects verified billing records to identify and analyze discrepancies between advertised prices, contractual terms, and actual charges. It transforms individual invoices into a structured public dataset that reveals systemic billing patterns across industries while protecting user identity through encryption and verification. https://roxanneardary.com/truthinbilling/

PrincipalPath is a deterministic mortgage refinancing specification designed to provide transparent, predictable financing for qualifying primary residences. It uses defined eligibility requirements, fixed interest calculations, affordable payment limits, and flexible principal repayment rules to create a clear path toward accelerated mortgage payoff. https://roxanneardary.com/principalpath/

Solvra is an open-source financial modeling engine designed to simulate loans under a controlled, transparent amortization system. It applies a capped-interest rule based on a 15-year maximum effective interest window and redistributes total interest evenly across the full loan term, producing predictable, linear payment structures for scenario analysis, affordability testing, and structured financial planning. https://roxanneardary.com/solvra/

OrgBudget is a modular standard for organizational budgeting that enables departments to manage budgets independently while maintaining centralized reconciliation, transparent reporting, financial accountability, and organization-wide oversight. It supports AI-assisted planning, forecasting, analysis, and reporting while keeping financial decisions under human authority. https://roxanneardary.com/orgbudget/