LocalEmu: a free, open-source AWS emulator. Run 132 AWS services locally with one pip install. No account, no token, no telemetry. The drop-in LocalStack alternative for the AWS CLI, boto3, Terraform and CDK.

A full-stack web dashboard for browsing and managing AWS resources running on https://localstack.cloud. Provides an AWS Console-like experience for local development with support for S3, SQS, SNS, IAM, CloudFormation, Lambda, and DynamoDB. Built with Fastify, React, and AWS SDK v3. Available as a web app, docker, standalone

Local GCP runtime for development and testing: unified Secret Manager, KMS, Eventarc, and IAM with full API compatibility. No credentials, no network, single process.

Local development companion for cloud-native apps. Iterate fast without cloud bills, then land cleanly on your CSP.

A modern web application for comparing cloud phone emulators with affiliate integration

Independent open-source LOCAL reimplementation of core Google Cloud Platform primitives (object storage, document DB, pub/sub, event functions) for offline development and testing. Pure stdlib. Not affiliated with Google.

Independent open-source LOCAL reimplementation of core Firebase developer primitives (Firestore-style docs, realtime JSON tree, local auth, static hosting, function triggers) for local development & testing. Std-lib Python, not affiliated with the vendor.

openaws — an independent, open-source LOCAL reimplementation of core AWS-style primitives (S3, DynamoDB, SQS, Lambda) for offline development and testing. Not affiliated with AWS.

openazure - an independent, open-source LOCAL reimplementation of core Azure primitives (Blob, Table, Queue, Functions) for local development and testing. Not affiliated with Microsoft.