XBLAH 

XBLAH's Modding Tool
I'm XBLAH and I develop the XBLAH's Modding Tool, a fantastic tool for creating and running mods. it's an extremely usefulmtool for all mappers and modders for Goldsrc and Source that puts an emphasis on making several tasks easier and streamlined so that you spend less time with trial and error and more time finishing the project of your dreams.

Patrons can download the tool here:
https://github.com/jean-knapp/xblah-modding-tool-public/releases/latest

Modding-Assets.net
I also host a website where I curate assets for the main Valve games. There are assets for GoldSrc, Source and Source 2 games. Every asset published has a standardized name and orientation, and are grid friendly, making your modding life easier. All assets are licensed as CC0 and can be downloaded instantly, giving you complete freedom. Although this is my hobby, keeping the site on air has a cost. If you support this idea, I hope you can help me keep this
initiative going. Be sure everything you download from Modding Assets will be of the highest quality, and always free, with no paywalls or accounts.
https://modding-assets.net