While JDownloader is not strictly "source-open" (it is "open core"), its plugin system is fully open and actively maintained on GitHub. It is widely considered the "Top" downloader for TezFiles.
There is no "top" GitHub tool that grants free premium speeds because TezFiles limits bandwidth at the server level. The "Top" approach involves using open-source managers to or manage premium accounts efficiently. tezfiles downloader github top
At the top of the search results for the past three months sits a repository named tez-unlocker (name changed for narrative). With over 250 stars, 42 forks, and a striking green “#1 trending” badge in its category, it claims to be “the fastest and most reliable TezFiles downloader.” While JDownloader is not strictly "source-open" (it is