Finance, Markets & Crypto — Useful Sites

KAP — Kamuyu Aydınlatma Platformu

2026-10-18T00:00:00Z

The platform where Borsa Istanbul companies publish their legal disclosures: financial statements, material-event notices, general meetings and capital increases. Unlike data sites such as Yahoo Finance it shows the filing in its first, binding form; the Turkish counterpart of the SEC’s EDGAR.

https://www.kap.org.tr/tr

TEFAS — Türkiye Elektronik Fon Alım Satım Platformu

2026-10-18T00:00:00Z

Takasbank’s investment-fund platform; its public pages compare prices, period returns and asset allocation across funds. Unlike a single bank’s fund list it puts the platform’s funds side by side in one table regardless of who runs them.

https://www.tefas.gov.tr/

Bitcoin Developer Documentation

2026-10-09T09:00:00Z

A developer guide and reference for building on Bitcoin: transactions, RPC and the P2P network. Unlike the white paper it is practical documentation.

https://developer.bitcoin.org/

Bitcoin Stack Exchange

2026-10-09T09:00:00Z

A Q&A site for Bitcoin users and developers. Unlike forums, answers are voted and edited, so the good one rises to the top.

https://bitcoin.stackexchange.com/

Bitcoin Whitepaper

2026-10-09T09:00:00Z

The nine-page paper that introduced Bitcoin. Unlike secondary explanations it is the source: short, readable, and the text every later claim should be checked against.

https://bitcoin.org/bitcoin.pdf

Bitcoin Wiki

2026-10-09T09:00:00Z

The community wiki on how Bitcoin works: protocol, script, history. Unlike news sites it is a maintained reference, not dated articles.

https://en.bitcoin.it/wiki/Main_Page

CCXT

2026-10-09T09:00:00Z

A library giving one API over more than a hundred crypto exchanges (JavaScript, Python, PHP and others). Unlike each exchange’s own SDK you write once and switch exchange freely.

https://github.com/ccxt/ccxt

CoinCap

2026-10-09T09:00:00Z

Crypto prices and market-cap rankings, with the data also available through a free API. Unlike busier trackers it is a plain table with direct data access.

https://coincap.io/

Electrum

2026-10-09T09:00:00Z

A lightweight open-source Bitcoin wallet, developed since 2011. Unlike full-node wallets it does not download the chain — you gain speed and trade some trust in servers for it.

https://electrum.org/

Ethplorer

2026-10-09T09:00:00Z

An Ethereum token explorer: holders, transfers and token pages. Unlike Etherscan it centres on tokens and their holder distribution.

https://ethplorer.io/

MetaMask

2026-10-09T09:00:00Z

The most widely used browser-extension wallet for Ethereum-compatible networks. Unlike hardware wallets the keys live in software on your device: convenient, but only as safe as your machine.

https://metamask.io/

OpenZeppelin

2026-10-09T09:00:00Z

Audited smart-contract libraries and security tooling for Solidity. Unlike writing token or access-control contracts yourself, they are building blocks tested in wide use.

https://www.openzeppelin.com/

Awesome AI in Finance

2026-09-18T00:00:00Z

A list of tools, data and papers solving finance problems with machine learning. Unlike general finance lists it focuses on the AI intersection.

https://github.com/georgezouq/awesome-ai-in-finance

Awesome Algorand

2026-09-18T00:00:00Z

A list of developer resources for Algorand, a proof-of-stake blockchain. Unlike Ethereum lists, it focuses on a pure proof-of-stake chain and its smart-contract tooling.

https://github.com/aorumbayev/awesome-algorand

Awesome Billing

2026-09-18T00:00:00Z

A list of engineering resources for payments, invoicing, pricing and accounting. Unlike a single payment provider’s docs it is vendor-neutral and covers the field’s traps — rounding, tax, currencies.

https://github.com/kdeldycke/awesome-billing

Awesome Bitcoin

2026-09-18T00:00:00Z

A list of services and tools for Bitcoin software development. Unlike general crypto lists, it focuses only on Bitcoin: libraries, node software, wallets, APIs.

https://github.com/igorbarinov/awesome-bitcoin

Awesome Bitcoin Payment Processors

2026-09-18T00:00:00Z

A list of processors and tools to start accepting Bitcoin payments. Unlike general payment lists, it focuses on Bitcoin only and sets self-hosted solutions beside custodial processors.

https://github.com/alexk111/awesome-bitcoin-payment-processors

Awesome Coins

2026-09-18T00:00:00Z

A list of cryptocurrency tools and algorithms — wallets, node software, libraries. Unlike price sites it collects the underlying technology, not the product.

https://github.com/Zheaoli/awesome-coins

Awesome Cosmos

2026-09-18T00:00:00Z

A resource list for Cosmos, a modular framework for building app-specific blockchains. Unlike writing smart contracts on Ethereum, you build your own application-specific chain with the Cosmos SDK.

https://github.com/cosmos/awesome-cosmos

Awesome Credit Modeling

2026-09-18T00:00:00Z

A list of methods for classifying credit applicants and modelling risk. Unlike general machine-learning lists, it gathers papers, datasets and methods specific to credit risk.

https://github.com/mourarthur/awesome-credit-modeling

Awesome Ethereum

2026-09-18T00:00:00Z

A list of developer resources for Ethereum, the smart-contract platform. Unlike general crypto lists, it focuses on smart-contract development — Solidity, development frameworks, testnets.

https://github.com/ttumiel/Awesome-Ethereum

Awesome Ledger

2026-09-18T00:00:00Z

A resource list for double-entry accounting on the command line (Ledger). Unlike accounting apps, the ledger is a plain-text file you can version with git; the list covers Ledger, hledger and Beancount.

https://github.com/sfischer13/awesome-ledger

Awesome Stock Trading

2026-09-18T00:00:00Z

A collection of libraries, strategies and data sources for stock trading. Not investment advice; a list of the tooling in one place.

https://github.com/shi-rudo/awesome-stock-trading

CoinGecko

2026-09-18T00:00:00Z

Market data for thousands of crypto assets, DEXes included, with a free API. Unlike CoinMarketCap (owned by Binance since 2020), it is independent and covers DEXes and small assets more widely.

https://www.coingecko.com

CoinMarketCap

2026-09-18T00:00:00Z

Widely used crypto prices and rankings by market cap. Unlike CoinGecko it has been owned by Binance since 2020 — worth remembering that an exchange owns this data source.

https://coinmarketcap.com

DefiLlama

2026-09-18T00:00:00Z

DeFi total-value-locked analytics across chains. Unlike analytics sites with a token of their own it has none and publishes its methodology, which is how it backs its claim to neutrality.

https://defillama.com

Dune

2026-09-18T00:00:00Z

An analytics platform where the community builds dashboards with SQL queries over blockchain data. Unlike block explorers such as Etherscan, you write your own analysis across the whole chain instead of looking at one transaction.

https://dune.com

Etherscan

2026-09-18T00:00:00Z

Ethereum’s canonical block explorer, with transaction tracing, contract verification and an API. Unlike Dune it is built for inspecting a single transaction, address or contract in detail.

https://etherscan.io

Finviz

2026-09-18T00:00:00Z

A visual stock screener that scans the US market on one screen with a heatmap and dense filters. Compared with Yahoo Finance it is for looking across the whole market and filtering, not one stock; real-time data is paid.

https://finviz.com

Glassnode

2026-09-18T00:00:00Z

Crypto market intelligence through on-chain metrics and derived indicators. Unlike price sites it analyses data from the chain itself — wallet flows, supply distribution; most metrics are paid.

https://glassnode.com

Investing.com

2026-09-18T00:00:00Z

Multi-asset real-time quotes together with an economic calendar in broad coverage. Compared with Yahoo Finance its economic calendar and coverage of Turkish markets, with a Turkish edition, are stronger.

https://www.investing.com

Investopedia

2026-09-18T00:00:00Z

An encyclopedia explaining finance and investing terms dictionary-style, with worked examples. Unlike market-data sites it teaches concepts, not numbers — the place to look when you first meet a term.

https://www.investopedia.com

Koyfin

2026-09-18T00:00:00Z

Bloomberg-like analytics dashboards for equities and macro, offered with a generous free tier.

https://www.koyfin.com

Macrotrends

2026-09-18T00:00:00Z

Free long-term charts of stocks and economic data going back decades. Unlike short-term trading charts it shows the long run — for seeing an indicator in historical context.

https://www.macrotrends.net

Musings on Markets (Aswath Damodaran)

2026-09-18T00:00:00Z

Valuation professor Aswath Damodaran’s writing, plus his free datasets — industry margins, cost of capital — updated each January. Unlike brokerage reports it shows its method openly.

https://aswathdamodaran.blogspot.com

Nasdaq Data Link (Quandl)

2026-09-18T00:00:00Z

A service aggregating financial and economic data from many sources under one API (formerly Quandl). Instead of pulling scattered sources one by one, you get them through a common interface.

https://data.nasdaq.com/

Portfolio Visualizer

2026-09-18T00:00:00Z

Runs portfolio backtesting, Monte Carlo simulation and factor analysis in the browser. Unlike building them by hand in a spreadsheet, the analyses come ready with the data; some features are paid.

https://www.portfoliovisualizer.com

StockAnalysis

2026-09-18T00:00:00Z

Fast, clean stock data and financials with a generous free tier. Compared with Yahoo Finance it has fewer ads, and financial statements are laid out cleanly with longer history.

https://stockanalysis.com

Yahoo Finance

2026-09-18T00:00:00Z

Quotes, financials and portfolio tracking, with free historical price downloads. Unlike paid terminals its free coverage is broad; the trade-off is that the data is mostly delayed.

https://finance.yahoo.com

Learn Me a Bitcoin

2026-08-17T20:53:20Z

Explains Bitcoin’s technical workings — transaction structure, script, mining — through worked examples. Against the whitepaper it is concrete: real transactions pulled apart byte by byte.

https://learnmeabitcoin.com/