Jabba vs PortBay

Jabba is a free Java version manager written in Go for installing and switching among JDK versions on macOS, Linux and Windows. Its JDK index, powered by DiscoAPI, lists versions for the user's operating system and architecture. The README names distributions including Oracle, Adopt OpenJDK, Zulu, IBM SDK, GraalVM, OpenJDK, Liberica and Amazon Corretto. Users can list remote JDKs, filter versions with semantic version ranges, install versions and switch among those installed. A `.jabbarc` file can specify a project's JDK, while a default alias can select the version used in new terminals. Jabba can link to a system JDK and coexist with an existing Java installation. The README documents shell integration for bash, zsh and fish, plus installation through Homebrew, shell scripts, PowerShell, Scoop or Docker. Custom JDK downloads are also supported. Jabba does not switch Java globally on its own; the README gives manual platform-specific snippets instead. The repository describes Jabba as a community fork that is a work in progress and warns that some README instructions may be outdated. It is licensed under Apache-2.0.

PortBay is a local development environment for running apps on a Mac and dispatching AI coding agents from a task board. Cards can be assigned to Claude Code, Codex, Cursor, or Antigravity; each card can have its own Git worktree so multiple agents can work on one repository at once. PortBay provides local project runtimes, trusted HTTPS on.test domains, per-project MySQL and PostgreSQL databases, and Mailpit email capture. Community includes public Cloudflare and SSH tunnels. Pro adds persistent SSH options including keep-alive, auto-reconnect, reverse tunnels, SOCKS proxy, and multi-hop. PortBay says source code is not uploaded and project files, task cards, the board, and agent comments stay on the machine. Agent sandboxing is on by default and denies access to credential stores and.env files outside the assigned project. The free Community plan supports up to six projects, two sandboxed runs, and one Mac. Pro is $10 a month for the first 100 licences while the subscription remains active, then $24 a month; it includes a 7-day trial. PortBay supports macOS and Linux; Windows is on the roadmap.