Free open source alternative app list of Sketch :

GIMP

GIMP is for GNU Image Manipulation Program (GIMP). GIMP is a cross-platform image editor available for GNU/Linux, macOS, Windows and more operating systems. It is free software. Whether you are a graphic designer, photographer, illustrator, or scientist, GIMP provides you with sophisticated tools to get your job done. You can further enhance your productivity with GIMP thanks to many customization options and 3rd party plugins.

FreeWindowsmacOSLinux

Figma

Figma is the leading collaborative design tool for building meaningful products. Seamlessly design, prototype, develop, and collect feedback in a single platform.

FreemiumWindowsmacOSAndroidiOS

Zeplin

Bring harmony to design delivery. Version control, user flows, design systems, sign-offs, and more. Zeplin unites your product team to accelerate design delivery at scale.

FreemiumWindowsmacOS

WPS Office

All-in-one Office Suite for Everyone, Free, Compatible, Shareable.

FreemiumWindowsmacOSLinuxAndroidiOS

Miro

Miro is a visual workspace for innovation where teams manage projects, design products, and build the future together. Join 70M+ users from around the world.

FreemiumWindowsmacOSLinux

Lucidchart

Lucidchart is the intelligent diagramming application where seeing becomes doing. With this intuitive, cloud-based solution, everyone can work visually and collaborate in real time while building flowcharts, mockups, UML diagrams, and more. Sign up for free now.

FreemiumWindowsmacOSLinux

Origami Studio 3

Origami Studio is a free design tool created by Meta and available for Mac. It allows designers to rapidly build and share interactive interfaces. With a new canvas interface, dynamic layout, Figma & Sketch support and a ton of peformance improvements and new patches.

FreemacOS

ProcessOn

Free online flowchart mind map. A professional and powerful drawing tool that supports real-time online collaboration among multiple people. It can be used to draw various graphics such as prototypes, UML, BPMN, network topology diagrams, etc.

FreemiumWindowsmacOSLinuxAndroidiOS

Pixso

Pixso is an all-in-one design collaboration tool that helps production and research teams create prototypes, ui/ux design, visual design, and low-code delivery for a more streamlined work experience, making team collaboration more efficient. sketch and figma formats are supported.

FreemiumWindowsmacOSAndroid

Visual Paradigm

Visual Paradigm Online offers a comprehensive solution to bring all your documents, presentations, PDFs, charts, and digital publications together under one roof. Bring all your documents, presentations, PDFs, charts and digital publications under one roof with Visual Paradigm Online. VP Online unites teams, goals and actions in one place.

FreemiumWindowsmacOSLinux

Justinmind

Easily create web and mobile app prototypes and wireframes with Justinmind UI prototyping tool. It's FREE. Start prototyping now!

FreemiumWindowsmacOS

Cacoo

Create diagrams online with a collaborative online diagramming tool. Join the 390,000 users drawing diagrams, flowcharts, and wireframes online with Cacoo. Diagram from anywhere. Online diagramming tool for collaborating on wireframes, flowcharts, and more

FreemiumWindowsmacOSLinux

Marvel

The collaborative design platform. Wireframe, prototype, user test, design and inspect designs in one place, for free! Or create an integration with our API.

FreemiumWindowsmacOSAndroidiOS

Visme

Create easy to follow flowcharts with Visme's free online flowchart maker. Choose from customizable shapes and lines to create the perfect flowchart. Free Online Flowchart Maker for Professional Flowcharts.

FreemiumWindowsmacOSLinux

UXPin

Design tool like no other. Prototypes that feel real, with powers of code components, logic, states, and design systems. Join for free!

FreemiumWindowsmacOS

ioDraw

Free online diagram software for making flow chart,mind map,Gantt Chart,Poster,org chart,UML,ER and network diagrams.

FreeWindowsmacOSLinux

Framer

Framer is where teams design and publish stunning sites. Use powerful yet familiar tools to create your ultimate website design. Import your designs from Figma.

FreemiumWindowsmacOS

Webflow

Create custom, responsive websites with the power of code — visually. Design and build your site with a flexible CMS and top-tier hosting. Try Webflow for free.

FreemiumWindowsmacOS

Others are looking for free open source alternatives of following apps:

Acorn 7

Acorn 7 is a Mac image editor for editing photos and creating graphics.

Ad Blocker

Ad Blocker is a browser tool that removes intrusive ads and pop-ups from web pages.

AdGuard

AdGuard is a cross-platform ad blocker that filters web content and protects privacy.

AdGuard DNS

AdGuard DNS is a DNS-based service that blocks ads, trackers, and malicious websites.

Adobe Premiere Pro

Adobe Premiere Pro is a professional video editing software for film, TV, and web.

AI & Machine Learning

Free open-source AI & machine learning tools.