LogChimp

Self‑hosted feedback platform to shape better products

Logfire

Simple Python‑centric observability platform for faster development

logkit

Unified log and metric collector with web console

Logseq

Privacy-first platform for knowledge management and collaboration

Logto

Modern auth infrastructure for SaaS and AI apps

Loki

Scalable, label-driven log aggregation built for Kubernetes

Loonflow

Visual, extensible workflow automation platform for enterprises

Lora

Rapid, lightweight fine-tuning for Stable Diffusion using LoRA

LoRAX

Serve thousands of fine-tuned LLM adapters on a single GPU

Lorien

Infinite canvas drawing app optimized for performance and simplicity

Lotus

Flexible pricing engine for SaaS, usage‑based and custom plans

Lowdefy

Config-driven web framework for building business apps fast

Lunr.js

Client-side full-text search library for fast, offline queries

Lura

Build ultra‑fast, extensible API gateways with Go middleware

Lynis

In-depth security auditing and hardening for UNIX-based systems

Maddy

Composable all-in-one mail server replacing multiple daemons

Maestro

Scalable workflow orchestrator powering Netflix’s data platform

Magda

Federated data catalog with scalable search and Kubernetes‑native deployment

Mage OSS

Build modern data pipelines locally with visual, modular code

magic-trace

High‑resolution, low‑overhead tracing of every function call

MailCatcher

Capture and view outgoing email locally via a simple web UI

MailCrab

Lightweight Rust‑based email sandbox with web UI and API

MailDev

Local SMTP server for testing emails during development

MailHog

Lightweight email testing tool with web UI and API