Mazenama/Mazeteyo/Mazetemo
Mazenama was a mobile app that allowed users to make ringtones with free Vocaloid software.
The software included "sweet" and "bitter" side voicebanks. Sweet voicebanks include Honoka, Yui, Sara, Mao, Yukino, Yuria, Miyu, Runa, Ayako, Haruko, Nanami, Aina, Mikuru, Iru, Karin, Takuto, Hayato, Elen, Mariru, Hinano, Mao, and Shoko. Bitter voicebanks include Kyohei, Kyo, Kein, Sin, Toru, Syu, Riku & Kai, Rei, Naoto, Yuma, Leon, Ricardo, Sota, Sakuya, Kaname, Kentaro, Daichi, Satoshi, Seishiro, Tomo, and Yasu.
The software is called "Mazeteyo Nama Voice" or Mazenama for short, though I've seen it spelt multiple ways. The website was originally up from 2008-2013, and was rebooted under a new URL in 2016. I've seen someone claim the site was up as of 2019.
Links:
Web Archive 1 (Original Release)
Web Archive 2 (Original Release)
Images:
Left: The website's hompage. Right: The character relationship chart.
Left: The relationship chart with hand-translated names. Right: Yui's machine translated bio.
Left: Yuria's machine translated bio. Right: CD cover.
Left: A promotional poster. Right: The guidebook cover.
Left: Fusigi Yuria's character bio. Right: A promotional image for Mazeteyo x Mini GPX.
Left: Images from the visual novel. Right: An image of the logo.
Left: Ricardo's machine translated bio. Right: Yuma's machine translated bio.
Left: Voice providers for the voicebanks. Right: Voice providers for the voicebanks.
Left: Another image of the logo. Right: The website's main visual.