Directory

Windows digital takeoff and estimating software from ConstructConnect that measures quantities on plans and prices them through assemblies and Excel

Spatial extension for PostgreSQL adding geometry, geography and raster types with indexing and hundreds of SQL functions

Python library for portfolio optimization: efficient frontier, Black-Litterman, hierarchical risk parity and discrete allocation

Open-source desktop GIS for viewing, editing, analysing and publishing vector and raster geodata, extensible with Python plugins

Algorithmic trading platform built on the open-source LEAN engine, with cloud backtesting, research notebooks and brokerage-connected live trading

Open-source C++ library for quantitative finance covering instruments, term structures, pricing engines and calendars, with Python and other bindings

Canada's national consumer portal for MLS listings, operated by CREA's REALTOR.ca Canada Inc., with licensed data syndication through the DDF

Official online access to Québec's land register: index of immovables, registered deeds and rights by lot number, run by the provincial government

Python library for quantitative portfolio optimization with many risk measures, robust estimators and hierarchical clustering models

Québec's municipal property assessment rolls: per-unit values and building attributes published by municipalities and as open data by the MAMH

Gordian's construction cost database of unit prices, assemblies and square-foot models with location factors, sold online and in annual books

The SEC's free public filing system: company and full-text search, bulk index and feed archives, and data.sec.gov JSON APIs for submissions and XBRL financial facts, subject to a fair-access rate policy

Canada's national statistical agency publishing census, economic and social data tables with open licensing and programmatic access via Web Data Service

Python library for vectorized backtesting and portfolio analysis built on pandas, NumPy and Numba, with a commercial PRO edition

Free access to World Bank development indicators by country and year through a web portal, bulk downloads and a public REST API

Community-maintained fork of Quantopian's Zipline, an event-driven Python backtester with data bundles and the Pipeline API