Best Component Libraries for Startups - Page 6

Jspreadsheet is a robust full-stack JavaScript data grid solution that directly integrates the functionality and user-friendly experience of spreadsheet applications like Excel and Google Sheets into your web applications. It offers a smooth, efficient user interface, enabling batch actions, table manipulation, and a host of other features that ensure flawless compatibility between your web application and Excel/Sheets. This familiar environment enhances productivity, simplifies user adoption, and minimizes the need for extensive training. Jspreadsheet is a comprehensive solution designed to meet a variety of application requirements in spreadsheet and data management for web platforms. It optimizes workflow development, streamlines process automation, and facilitates the smooth transition of tasks from Excel to the web. Additionally, Jspreadsheet provides a wide range of extensions to address diverse needs within the data grid and spreadsheet ecosystem, making it a versatile choice.

Petal is a comprehensive suite of tools designed to accelerate the development of Phoenix web applications by providing pre-built, customizable components and templates. It features over 100 open source HEEX components styled with Tailwind CSS, enabling developers to rapidly build user interfaces without extensive design work. The framework includes Petal Pro, a feature-rich Phoenix boilerplate that offers functionalities such as social logins, multi-tenancy support, styled components, Oban integration for background jobs, and Stripe for subscription management. Petal emphasizes rapid development, scalability, and maintainability, allowing developers to focus on building unique features rather than repetitive boilerplate code. It also provides a Figma UI kit for seamless collaboration between designers and developers. By leveraging Petal, developers can streamline their workflow, and reduce development time.

At Ripplix, we’re passionate about the small details that make digital products truly delightful. In a world filled with interfaces, it’s often the subtle animations and thoughtful micro-interactions that create a lasting impression. They make apps feel alive, guide users effortlessly, and elevate the overall experience. Ripplix was born from the idea that these moments—these “ripples” in design—deserve their own spotlight. Our platform is a curated library of UI animations and micro-interactions sourced from real-world digital products. From smooth hover effects to clever transitions and satisfying loading states, Ripplix showcases the kind of design polish that turns good products into great ones.

pandas is a fast, powerful, flexible and easy to use open source data analysis and manipulation tool, built on top of the Python programming language. Tools for reading and writing data between in-memory data structures and different formats: CSV and text files, Microsoft Excel, SQL databases, and the fast HDF5 format. Intelligent data alignment and integrated handling of missing data: gain automatic label-based alignment in computations and easily manipulate messy data into an orderly form.Aggregating or transforming data with a powerful group by engine allowing split-apply-combine operations on data sets. Time series-functionality: date range generation and frequency conversion, moving window statistics, date shifting and lagging. Even create domain-specific time offsets and join time series without losing data.

Over 80 Angular UI components with top-notch quality to help you implement all your UI requirements in style. Crafted on a design-agnostic infrastructure, choose from a vast amount of themes such as material, bootstrap, tailwind, primeone, or develop your own. 280+ ready-to-copy-paste UI blocks to build spectacular applications in no time. The designer is the ultimate tool to create your own PrimeNG experience powered by a SASS-based theme engine with 500+ variables and a visual designer. Professionally designed highly customizable application templates to get started in style. Open source products of PrimeTek are used all around the world by millions of developers. The ultimate set of UI components to assist you with 90+ impressive Angular components. Connect with the other open source community members, collaborate, and have a voice in the project roadmap. Boost your productivity by achieving more in less time and accomplish amazing results.

dbExpress is a database-independent layer that defines common interface to provide fast access to SQL database servers from Delphi and C++Builder including Community Edition, on Windows and macOS (32-bit and 64-bit) and Linux (64-bit) platforms. For each supported server, dbExpress provides a driver as an independent library that implements the common dbExpress interfaces for processing queries and stored procedures. As data-access layer is thin and simple, dbExpress provides high-performance database connectivity and is easy to deploy. You can use our drivers in the same way as the ones supplied by Embarcadero.

Write the backend and frontend of a feature in a single component and let the framework decide where the code should run. Nullstack provides you with all the tools you need to stay focused on the product. On the first render, you'll get SEO-ready HTML optimized for the first paint of your route in a single request using local functions with zero JavaScript dependencies in the client bundle. After the content is served and the network is idle Nullstack JavaScript is loaded, the state of the application is restored through hydration and it becomes a single-page application. Subsequent server functions will fetch JSON from an automatically generated microservice API, deserialize the response, update the application state, and rerender the page out of the box. A full stack lifecycle combined with a feature-driven mindset allows you to write clean and reusable code without the need to create APIs manually.

ggplot2 is a system for declaratively creating graphics, based on The Grammar of Graphics. You provide the data, tell ggplot2 how to map variables to aesthetics, what graphical primitives to use, and it takes care of the details. ggplot2 is now over 10 years old and is used by hundreds of thousands of people to make millions of plots. That means, by-and-large, ggplot2 itself changes relatively little. When we do make changes, they will be generally to add new functions or arguments rather than changing the behavior of existing functions, and if we do make changes to existing behavior we will do them for compelling reasons. If you are new to ggplot2 you are better off starting with a systematic introduction, rather than trying to learn from reading individual documentation pages.

Seaborn is a Python data visualization library based on matplotlib. It provides a high-level interface for drawing attractive and informative statistical graphics. For a brief introduction to the ideas behind the library, you can read the introductory notes or the paper. Visit the installation page to see how you can download the package and get started with it. You can browse the example gallery to see some of the things that you can do with seaborn, and then check out the tutorials or API reference to find out how. To see the code or report a bug, please visit the GitHub repository. General support questions are most at home on StackOverflow, which has a dedicated channel for seaborn.

DotNetBrowser is a cross-platform .NET library that integrates a Chromium-based web browser component into .NET applications, offering a comprehensive API for web page interaction, DOM access, network control, printing, automation, scraping, and more. It supports integration with Avalonia, WPF, and WinForms.

Velt is a full-stack collaboration SDK that enables developers to embed rich, real-time, and asynchronous collaboration features into web applications with minimal effort. With Velt, you can add contextual comments (à la Figma or Google Docs), live presence indicators, shared editing, “follow me” view modes, and Slack/Meet-style huddles (audio, video, screen sharing). Velt also offers built-in Loom-style recording (screen, camera, or audio), complete with AI-powered transcription and auto-summaries, so users can leave video or voice feedback and later search or scrub to relevant bits. Additional collaboration tools include in-app notifications, mentions, reactions, arrows/highlights for annotation, analytics dashboards for tracking engagement, and flexible UI components you can style to match your app’s branding. It handles all the complexity, real-time syncing, conflict resolution (via CRDTs), offline handling, scaling, and optional self-hosting.

E-iceblue provides a comprehensive suite of professional development libraries and APIs designed to enable developers to create, read, write, edit, convert, print, manipulate and view a wide range of document formats programmatically across multiple programming environments without relying on external applications like Microsoft Office or Adobe Acrobat. Its product range includes Spire.Office and individual components for .NET platforms (such as Spire.Doc, Spire.XLS, Spire.Presentation, Spire.PDF, Spire.Barcode, Spire.Email and Spire.OCR) that handle Word, Excel, PowerPoint, PDF, barcode generation and email operations in C#, VB.NET, ASP.NET, .NET Core, Xamarin and WPF applications, plus viewer libraries for embedded document display. E-iceblue also offers equivalent APIs for Java, C++, Python and JavaScript, as well as mobile and cloud libraries (including Spire.Cloud.Office with HTML5 browser support for Word and Excel), supporting document processing tasks.

A free and open-source collection of lightweight JavaScript plugins, combining several common tools in a single package to facilitate the acceleration of web application development.

QtitanSolution - includes the components for Qt.C++ development in the single distributive: QtitanDataGrid, QtitanRibbon, QtitanDocking, QtitanNavigationDesignUI, QtitanChart, QtitanFastInfoset. The solution is set up to get you started right away.

MUI offers a comprehensive suite of UI tools to help you ship new features faster. Start with Material UI, our fully-loaded component library, or bring your own design system to our production-ready components. Build at an accelerated pace without sacrificing flexibility or control. Every component you need is ready for production. Build beautiful UIs with ease. Start with Google's Material Design, or create your own sophisticated theme. Our components are as flexible as they are powerful. You always have full control over how they look and behave. We believe in building for everyone. That's why accessibility is one of our highest priorities with every new feature we ship. Find out why MUI's tools are trusted by thousands of open source developers and teams around the world. Get a growing list of components, ready-to-use, free forever, and with accessibility always in mind. We've built the foundational UI blocks for your design system so you don't have to.