AniRena.com is described as 'AniRena is a Torrent Tracker that offers a place for Asian/Japanese material. Anime, Live Action, Manga, Music, Images, etc... The Tracker officially started in 2003' and is an app in the File Sharing category. There are 2 alternatives to AniRena.com for Online / Web-based. The best alternative is Nyaa.si, which is both free and Open Source.
This site is one of the replacements for the discontinued NyaaTorrents. For more information, please read https://nyaa.pantsu.cat/faq. The old database containing all of the torrents shared by Nyaa up to May 1st, 2017 was used as a base.