
SurveyJS comprises a collection of four open-source JavaScript libraries that provide the advantages of a customized, in-house survey application while significantly minimizing the time and resources required for deployment. These libraries function independently of specific server code or database needs, allowing for seamless integration with well-known JavaScript frameworks such as React, Angular, Vue.js, jQuery, Knockout, and others. They are built to interact with any server capable of processing JSON requests, thereby ensuring compatibility with a wide range of server setups and databases.
This product suite includes:
- An open-source library licensed under MIT that facilitates the rendering of dynamic JSON-based forms within your web application and captures user responses.
- A self-hosted form builder featuring drag-and-drop functionality, an integrated CSS theme editor, and a graphical user interface for setting conditional rules; it also generates JSON definitions of your forms in real time.
- A PDF Generator library that allows for the conversion of SurveyJS surveys and forms into PDF files directly in the browser.
- The Dashboard library, which enhances survey data analysis through interactive and customizable charts and tables.
We invite you to explore our website and experience our comprehensive demo at no cost. This opportunity will allow you to assess the full capabilities of SurveyJS firsthand.
Learn more

Okyline is an Executable Data Design (EDD) platform that transforms validation contracts into executable operational assets for enterprise data quality.
Instead of multiplying specifications, custom validators, monitoring scripts, tests, and reporting layers, Okyline relies on a single readable contract shared across validation, quality control, and operational monitoring activities.
The contract itself becomes executable and directly drives deterministic validation, advanced business invariant verification, multi-format processing, data quality gates, operational metrics, and historical quality analytics.
Okyline validates APIs, enterprise events, files, streaming payloads, LLM structured outputs, and distributed data flows while continuously producing measurable quality indicators, completeness statistics, validation traces, and error propagation insights.
Because contracts are created from annotated sample data, validation rules remain immediately understandable for developers, architects, QA teams, integration specialists, and business analysts.
The Community Edition includes the public specification, a free Java validation runtime, a Claude AI assistant for contract generation, JSON Schema transpilation support, and a free online studio for executable JSON contracts.
The Enterprise Edition extends the same contract-centric model to native validation of JSON, JSONL, XML, CSV, FIXED, and EDI flows, combined with operational quality dashboards, data quality gates, and long-term quality tracking capabilities, all without requiring databases, warehouses, or centralized infrastructure.
Learn more
Moment.js
Moment.js is a robust JavaScript library designed for comprehensive date manipulation, including parsing, validating, formatting, and adjusting dates. It operates effortlessly across both web browsers and Node.js, ensuring consistent compatibility across various platforms, a capability that is validated through unit tests executed in both environments. Due to its extensive usage, Moment.js has found its way into millions of applications worldwide. By September 2020, it recorded a remarkable achievement of surpassing 12 million downloads weekly! Since its launch in 2011, Moment has undergone numerous improvements, yet its foundational design principles have largely remained unchanged. It supports Internet Explorer 8 and later versions, broadening its accessibility to a diverse audience. While some date libraries are modularized or use plugins, others take advantage of the ECMAScript Intl API to enhance locale and time zone features. Libraries such as Moment and Moment-Timezone still provide their own files dedicated to locale and time zone information. This flexibility is essential, particularly as various locales have different interpretations of week-of-the-year numbering; Moment.js therefore includes options for retrieving and setting the localized week of the year, ensuring a tailored user experience. Additionally, developers appreciate its wide array of functionalities, making Moment.js an indispensable resource for anyone working with dates and times in web development.
Learn more
findAddress.io
FindAddress.io is a fast and reliable API for address lookup and postcode verification in the UK, crafted specifically for developers and businesses that require accurate address data without the usual complications or costs associated with larger enterprise solutions.
Our RESTful JSON API includes functionalities like postcode lookups, address autocomplete, and real-time address validation, which together improve form completion rates, reduce address errors, and help obtain clean, structured UK address information instantly upon entry.
Designed for modern web applications, findAddress.io integrates effortlessly into numerous platforms, including checkout systems, registration forms, customer relationship management tools, and internal applications, while supporting widely-used programming languages such as JavaScript, PHP, and Node.js.
As a result, it proves to be an excellent option for organizations looking to enhance their data collection processes, ensuring both precision and effectiveness. Furthermore, the user-friendly nature of the API allows businesses to implement it quickly, minimizing disruption and maximizing operational efficiency.
Learn more