Some of my favorites :)

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  Without a Hive A young changeling is separated from his hive, and must blend in and survive among the ponies of Equestria. by Phoenix_Dragon 180,648 words · 2,111 · 32
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  A Beginner's Guide to Heroism A unicorn wizard must come to terms with what it means to be a hero, and whether that choice is worth abandoning his magical mentor's teachings. by LoyalLiar 246,346 words · 310 · 8
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  Castling Cozy Glow Castling is a special move in chess where a player’s rook ends up just next to the king. Thanks to a friend’s kindness, a calculating young filly would end up closer to her princess than she ever thought. But can a filly like Cozy Glow be changed? by Silvermyr 86,538 words · 292 · 14
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  Transcend Alone and powerless, Chrysalis must turn to a last resort to regain her power. by Anonymous Pegasus 46,244 words · 1,850 · 37