If Steam Workshop downloader is not working and you are not able to install game mods, then these solutions will resolve the issue.

Valve has just issued a massive Source SDK update giving modders access to the Team Fortress 2 game code, opening the door for them to build all-new games based on the classic FPS and publish ...

"To respect that, we're asking TF2 mod makers continue to respect that connection, and to not make mods that have the purpose of trying to profit off Workshop contributors' efforts. We're hoping ...