OpenSend

Openship is an open-source, self-hostable application deployment platform with built-in CI/CD. It takes a repository, detects or supports its stack, builds and ships the application as containers, and handles routing and TLS termination. Deployments can be controlled through a desktop app, web dashboard, or CLI; GitHub webhooks support push-to-deploy workflows, and the platform supports repeatable rollbacks. The control plane can run locally in the desktop app, as a self-hosted server, or through Openship Cloud. In Compose mode it runs the platform stack on a Docker host and can host deployed applications there; in bare mode it runs as a lightweight process and deploys to a server over SSH or to the cloud.

OpenSEO is an open-source SEO tool developed as a self-hostable alternative to Semrush and Ahrefs. It provides workflows for keyword research, rank tracking, competitor insights, backlink analysis, site audits, and AI visibility, using a DataForSEO API key for the underlying SEO data. The project exposes an MCP server and reusable agent skills that let agents such as Claude Code, OpenClaw, and Hermes access SEO data and perform guided SEO tasks. It can be self-hosted with Docker for personal use or Cloudflare for internet-facing use across devices or teams; a hosted version is also available, with pricing described as pay-as-you-go for API usage and a subscription option.

Open Archiver is a self-hosted, open-source platform for archiving, storing, indexing, and searching email from Google Workspace, Microsoft 365, IMAP inboxes, PST files, zipped EML files, and Mbox files. It supports bulk imports and ongoing synchronization, and provides full-text search across messages and attachments with filters and thread discovery. Messages are stored as standard EML files with deduplication, compression, and encryption at rest. Storage can use a local filesystem or an S3-compatible object store. The system records file hashes during ingestion and provides integrity reports, retention policies, and an immutable audit trail for access and activity tracking. The platform is deployed with Docker Compose and uses SvelteKit, Node.js with Express and TypeScript, BullMQ with Redis or Valkey for asynchronous jobs, Meilisearch for indexing, and PostgreSQL for metadata, users, and audit logs.

SendGrid is an email API and email marketing campaigns platform from Twilio. It sends transactional messages such as waiver copies and organizer alert emails.

LocalSend is a free, open-source cross-platform app for securely sharing files and messages between nearby devices over a local network without an internet connection or third-party servers. It uses a REST API for device communication, HTTPS for data transfer, and TLS/SSL certificates generated on each device. The app is available for Windows, macOS, Linux, Android, iOS, and Fire OS through app stores, package managers, and downloadable installers. Its command-line client can send files and directories to a discovered device or a specified alias or IP address using LocalSend Protocol v2.