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585 projects, sorted by GitHub stars.

Plunk

Alternative toSendGrid

Transactional email, campaigns, and automations on one contact list.

  • 5,538 GitHub stars
  • AGPL-3.0Licence AGPL-3.0
  • #Email

Unkey

Alternative toKong Konnect

Unified API keys, gateways, and observability for developers.

  • 5,471 GitHub stars
  • FSL-1.1-ALv2Licence FSL-1.1-ALv2

armorpaint

Alternative toAdobe Substance 3D Painter

Open source 3D PBR texture painting with GPU acceleration

  • 5,390 GitHub stars
  • CustomLicence zlib/libpng License

open-science

Alternative toClaude Science

Open-source AI workbench for reproducible scientific research

  • 5,304 GitHub stars
  • Apache-2.0Licence Apache-2.0
  • #AI Agents

code-graph-rag

Alternative toAugment AI

AI-powered codebase analysis with knowledge graphs

  • 5,268 GitHub stars
  • MITLicence MIT

tabularis

Alternative toTablePlus

Open-source desktop SQL workspace with AI, notebooks, and MCP

  • 5,253 GitHub stars
  • Apache-2.0Licence Apache-2.0
  • #Database

Kener

Alternative toAtlassian Statuspage

Open source status page built with SvelteKit and SQLite

  • 5,211 GitHub stars
  • MITLicence MIT
  • #Monitoring

Mailflare

Alternative toFastmail

Self-hosted email inbox for custom domains on Cloudflare

  • 5,117 GitHub stars
  • AGPL-3.0Licence AGPL-3.0

Digger

Alternative toHashiCorp Terraform Cloud

Self-hosted Terraform CI/CD that runs natively in GitHub Actions

  • 5,056 GitHub stars
  • MITLicence MIT

OrientDB

Alternative toAzure Cosmos DB

Multi-model NoSQL database: graphs, docs, and key-value

  • 4,995 GitHub stars
  • Apache-2.0Licence Apache-2.0
  • #Database

Plexo

Alternative toInternet Download Manager

Multi-network download manager for files, torrents, and magnets

  • 4,835 GitHub stars
  • MITLicence MIT

Thunderbolt

Alternative toChatGPT

Control your AI infrastructure with Thunderbolt

  • 4,799 GitHub stars
  • MPL-2.0Licence MPL-2.0
  • #AI Agents
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