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3 repositories by Attention Score · May 7, 2026 – Nov 2, 2026 (UTC)

Language: Java
Topic: key-value
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1.apache / zookeeper

Apache ZooKeeper

zookeeper
database
hacktoberfest
java
apache
consensus
+8 more

Java APACHE-2.013K total7.3K forks

+149 stars

from 12,677 · score 5.01

2.JetBrains / xodus

Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.

embedded-database
java
kotlin
key-value
entity-store
transactional
+8 more

Java APACHE-2.01.3K total117 forks

+19 stars

from 1,242 · score 3.00

3.lmdbjava / lmdbjava

Lightning Memory Database (LMDB) for Java: a low latency, transactional, sorted, embedded, key-value store

lmdb
java
key-value
embedded-database
database
in-memory
+1 more

Java APACHE-2.0874 total125 forks

+8 stars

from 866 · score 2.20

Order: Attention Score

Most net stars gained in the window first. The score only puts this gain on a log scale, so the order is the order of the gain.

How the ranking works

Ranked by stars gained in the window. The score is the natural log of one plus that gain, so a repository's rank is exactly its star gain's rank.

score = log1p(net stars gained in the trailing T complete UTC days)

A repository is ranked only when its Star History covers every day of the window and its latest Observation is not missing.

The longest window is 180 days. Star History from the Repository Host goes back at most 180 days before a repository's first Observation. A longer window needs more days of Observations first. A repository younger than the window is not ranked in it.

The filters narrow the same eligible repositories. A repository matches the topics when it has any of them. Total stars is the count now. Last push and creation on the Repository Host count back from the start of today (UTC). The counts beside the languages, licenses, and topics include all ranked repositories in the window. A Category holds the repositories that its published rules match; see Categories.

Repositories enter the index from the Seed Dataset or by gaining stars faster than the published admission threshold, whatever their size. Admission is permanent, so an archived repository can still rank.

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