There was a trial version of the Hatsune Append. Luka also had one but Ithe details are much harder to find. Miriam has one which may still be on Zero-G's website. Lily and Nekomura Iroha also had a 30 days trial. Piko had a 5 day version. Aside from Miriam, most only lasted until the Vocaloid was released, Miku and Lily's trials were released via CD, with Miku's being in DTM magazine and Lily's on the M.O.V.E. album.