719 Open source projects that are alternatives of or similar to Checkmail

🚝 "Scala on Rails" - A full-stack web app framework for rapid development in Scala

A simple (but correct) library for validating email addresses. Supports mail addresses as defined in rfc5322 as well as the new Internationalized Mail Address standards (rfc653x). Based on https://github.com/jstedfast/EmailValidation

mailcow: dockerized - 🐮 + 🐋 = 💕

Sieve Script Editor

PySchemes is a library for validating data structures in python

A serialization/deserialization/validation library for strings, mappings and lists.

A declarative validation errors module for reactive forms.

🏗️MSON Lang: Generate an app from JSON

Python 3.5+ runtime type checking for integration testing and data validation

Jodd! Lightweight. Java. Zero dependencies. Use what you like.

A high-performance, extensible argument validation library.

Turn a ReactElement into the corresponding JSX string

Open PaaS Enterprise Social Network

Custom Field component with validation for creating easier form-like UI from interface builder.

Validate GraphQL fields

[Go] Package of validators and sanitizers for strings, numerics, slices and structs

📋 React Hooks for form state management and validation (Web + React Native)

Self-hosted server for the ProtonMail client

CheckBox, Radio Button, Labeled Slider, Dropdowns etc.

Dovecot mail server

📐 Validating data structures against a given Schema.

📞 Highly customizable phone input component with auto formatting

JsPrettier is a Sublime Text Plug-in for Prettier, the opinionated code formatter.

Emails at the heart of your business logic!

A simple application demonstrating the basic usage of permissions with NestJS (JWT, Passport, Facebook, Google+, User, Group, Permission)

SMTP (email) server with a focus on simplicity, security, and ease of operation [mirror]

A proxy that validates responses and requests against an OpenAPI document.

Data validation, serialization, deserialization & form rendering. 🔢

A graphical threads-with-tags style, lightweight and fast, e-mail client for Notmuch

Indicative is a simple yet powerful data validator for Node.js and browsers. It makes it so simple to write async validations on nested set of data.

Parameter Validation & Type Coercion for Sinatra

Technical specifications and guidelines for implementing Frictionless Data.

BunnyJS - Lightweight native (vanilla) JavaScript (JS) and ECMAScript 6 (ES6) browser library, package of small stand-alone components without dependencies: FormData, upload, image preview, HTML5 validation, Autocomplete, Dropdown, Calendar, Datepicker, Ajax, Datatable, Pagination, URL, Template engine, Element positioning, smooth scrolling, routing, inversion of control and more. Simple syntax and architecture. Next generation jQuery and front-end framework. Documentation and examples available.

Library to send e-mails over different transports and protocols (like SMTP and IMAP) using immutable messages and streams. Also includes SMTP server.

SwiftCop is a validation library fully written in Swift and inspired by the clarity of Ruby On Rails Active Record validations.

☑️ JavaScript fluent validation library

Runtime type system for IO decoding/encoding

⚔ Go package for data validation and filtering. support Map, Struct, Form data. Go通用的数据验证与过滤库，使用简单，内置大部分常用验证、过滤器，支持自定义验证器、自定义消息、字段翻译。

A light-weight, flexible, and expressive pandas data validation library

Language-agnostic HTTP API Testing Tool

A fast golang library for MIME type and file extension detection, based on magic numbers

A set of useful Laravel validation rules

An express.js middleware for validator.js.

Elegant and composable validations

A Gatsby email *application*

🛰 Skema provides a handy & composable way to validate / transform / purify the input data.

MFCMAPI

Easily integrate Credit Card payments module in iOS App. Swift 4.0

A Swift framework for parsing, formatting and validating international phone numbers. Inspired by Google's libphonenumber.

🛂 A result type that accumulates multiple errors.

PHP Standalone Validation Library

A better way to make GUIs for your python apps

Stringifies any javascript object in your console for CLI inspection ✨

Simple, modern & fast web-based email client

⁉️轻量级的 JavaScript 表单验证，字符串验证。没有依赖，支持 UMD ，~3kb。

A simple JavaScript validation library that doesn't interfere

GraphQL query complexity analysis and validation for graphql-js

PHP receipt validator for Apple iTunes, Google Play and Amazon App Store

A simple and composable way to validate data in JavaScript (and TypeScript).

Accord: A sane validation library for Scala