Auth0 - Authentication management with native support for Angular, React and VueJS.

Firebase - PaaS from Google, including authentication management.

Okta - Authentication and Authorization solution with support for Angular, React and VueJS.

Onelogin - Authentication focussed on company internal applications.

Microsoft Azure Active Directory - Authentication management in Azure, based on Microsoft accounts.

AWS Cognito - AWS authentication management. Frontend integration is part of 

Static Forms - Form that sends its results to your email.

FlyingForms - Building, versioning and managing forms.

Spotify web playback SDK - Client-side JavaScript library which allows you to create a new player in Spotify Connect and play any audio track from Spotify in the browser via encrypted media extensions.

EmbedSocial's embedfeed - Social media aggregator.

Search UI - UI integration for ElastiSearch.

Zoho Bookings - Online scheduler integrated into Zoho Suite.

Acuity Scheduling - Appointment scheduling with extensive API.

10to8 - Booking tool with many features in the free tier.

SuperSaaS - Appointment scheduling with focus on group scheduling.

SimplyBook.Me - Booking tool with its own booking directory.

OnceHub - Scheduling via ScheduleOnce and meeting management via InviteOnce.

YouCanBookMe - Online scheduling for teams.

OnSched - Scheduling API for marketplaces &amp; applications.

AppointmentPlus - Appointment scheduling with coupons.

Booxi - Booking and online directory components.

Cogsworth Scheduler - Online Scheduler for business with a powerful API.

JustReview - Collect reviews from e-commerce, social media and review service providers and embed on a website.

ReviewsOnMyWebsite - Collect, monitor and display customer reviews.

Fresh chat - Chatbot in Freshworks support suite.

TrustPulse - Shows recent buyers on your website.

Beamer - Combination of push notifications and changelog management.

Changelogfy - A product release notes tool.

Changefeed - Changelog as stand-alone page or embeddable widget.

Canny's Changelog - Combines changelog with product roadmaps.

ProductFlare's Changelog - Changelog widget around a product team task management system.

Sentry - Full-stack error monitoring with release management included.

Raygun Crash Reporting - Error monitoring as part of the Raygun suite.

Honeybadger - Error, uptime and check-in monitoring.

Rollbar - Error monitoring with the ability to replay HTTP requests that caused errors.

Tailwind UI - UI components, by the creators of Tailwind CSS.

Webix - JavaScript UI library and framework for displaying data in different ways.

Webatoms - JavaScript bridge for Xamarin.Forms.

Creative Tim - Themes for React, Angular, Vue, Lavarel and HTML5.

Syncfusion - Data visualization components and PDF Viewer.

UIfort - UI design systems for all major frontend frameworks.

Semantic UI - Open source UI component library for React, Meteor, Ember and Angular.

Design Revision's Shards Pro - Design blocks for web or mobile apps.

Themesberg - Bootstrap templates, themes and UI kits.

Treact - React templates for landing pages, built on Tailwind CSS.

Creative Designs Guru - Themes for React, Nextjs and Eleventy, built with Tailwind CSS.

OneSignal - Mobile and web notifications.

Notific - Notifications including a PHP SDK.

WonderPush - Notifications focused on speed.

VWO Engage - Notifications as part of a larger marketing suite.

Signalize - Free notifications with paid analytics add on.

AddThis - Social sharing buttons, available on AMPs.

AddToAny - Sharing buttons for many different target services.

Optimizely's Rollouts - Feature flags combined with A/B testing.

LaunchDarkly - Feature management with multiple integrations in CI servers and ticketing systems.

Split - Another feature management with multiple integrations in CI servers and ticketing systems.

Rollout - Feature management focusing on segmented roll-out of features.

Wisepops - Contextual popups, banners and bars for mobile and desktop visitors.

Listagram - Interactive opt-in form for collecting email addresses.

Poptin - Popups and forms that can be integrated anywhere in the website.

Vonage - Voice, messaging, video and data capabilities across unified communications, contact centers and communications APIs.

Contentful - Headless content management system.

usercentrics - Compliance manager that can be implemented as part of existing pages.

Sourcepoint - Compliance management as part of a suite including also ad blocker recovery.

PiwikPro - Compliance management as part of an analytics tool.

Consent Management Provider - German management tool for Cookie Consent.

UniConsent - Consent management platform for GDPR, CCPA, COPPA compliance.

TrustArc - Privacy management for the CCPA, GDPR, LGPD and 900+ other global regulations.

iubenda - Consent management and terms and conditions generator.

Civic Cookie Control - Smaller Cookie and GDPR compliance product.

CookieInformation - Focus on compliance reporting via a dashboard.

CookiePro - Cookie management as part of a privacy management solution.

React Cookie Consent - A small and customizable cookie consent bar for React applications.

React Cookie Banner - React cookie banner which can be automatically dismissed with a scroll.

Repository of BUILDING BLOCKS FOR WEB APPS Resources in May 2025

Select category under building-blocks-for-web-apps projects and apps that you are looking to build in May 2025

Last Updated: 27 May 2025

Repository of building blocks for web apps Resources

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