ServerPortal (NeoForge)

Built largely off of AutoModpack, this ultra-light client has a bare minimum of mods on installation. Instead, users download and play mods by joining modded servers augmented with AutoModpack. This even allows players to connect to a vareity of different modpack servers so long as the modloader and minecraft versions match.

A note on security from the makers of AutoModpack:

Be aware that this mod allows remote servers to download arbitrary executable files directly into your computer. It's crucial to only use it on servers you absolutely trust. A malicious administrator or a compromised server can include harmful files such as malware - to protect against this, please use sandboxed launchers such as Pandora or if you are on Linux, use launchers installed via Flatpak.

While AutoModpack itself tries to be as secure as possible, due to the nature of the internet, the creators and contributors of AutoModpack are not responsible for any harm, damage, loss, or issues that may result from using the mod. By using AutoModpack, you acknowledge and accept this risk.

Read more on AutoModpack on their wiki here.