llttz - tiny Java library which allows to retrieve time zone accordingly to location's lat/lon (made specifically for Android devices).
rss-parser - Open Source Android library for rss parsing.
Razbor Poletov - Android application written for the listeners of the eponymous Russian IT podcast. Written in Scala, I should add.
smartfiction - Android application made for those who love to read small stories every day. Russian language only.