Yes, it is true! The classic Traveller Starter Edition is FREE over at DriveThruRPG! The “purchase” consists of three PDF files, a book of core rules, a separate set of charts, and a book of adventures.
I never owned this set as I had the original digest boxed set, but it appears to contain rules essentials in a format similar to The Traveller Book. The charts book contains a character sheet and subsector grid, as well as several charts for combat, starship design and construction, world generation and encounters among others. The adventures book contains two adventures; Mission to Mithril and Shadows.
You can get this little gem for the attractive price of zilch, nil, nada, bupkis, naught right here.