Update README.md

2019-04-23 12:51:39 +08:00 · 2019-04-23 12:51:39 +08:00 · 1cf7a2ea6f
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 ## Alternatives to other Mainstream services

+### Microblogging (Tumblr)
+* None :(
+
 ### Microblogging (Twitter)
 _Stable_
 * ![GitHub last commit](https://img.shields.io/github/last-commit/tootsuite/mastodon.svg?style=plastic) [Mastodon](https://github.com/tootsuite/mastodon) - _Ruby_ "Mainstream reference design"