Velheim offers a mix of RS3 content on a pre-eoc client. Enjoy the old combat and interface styles with all of the latest RuneScape 3 content.
https://www.retroserver.info/toplist/Welcome to Hybrid Revision Retro & Modern: the ultimate RSPS that balances classic Old–School gameplay with fresh, semi-custom innovations. Hosted in the UK and regularly updated, Retro supports multiple revisions (317, 637, OSRS, 2006, 2011) to suit nostalgia lovers of all kinds.