1.questdb / questdb
QuestDB is a high performance, open-source, time-series database
- time-series
- low-latency
- database
- sql
- questdb
- tsdb
- +14 more
+712 stars
from 16,781 · score 6.57
Trending repositories
Ranked by Attention Score: stars gained over the last 180 complete days
10 repositories by Attention Score · May 7, 2026 – Nov 2, 2026 (UTC)
2.killbill / killbill
Open-Source Subscription Billing & Payments Platform
- killbill
- billing
- payments
- subscriptions
+405 stars
from 5,430 · score 6.01
3.ta4j / ta4j
A Java library for technical analysis.
+123 stars
from 2,401 · score 4.82
4.JSQLParser / JSqlParser
JSqlParser parses an SQL statement and translate it into a hierarchy of Java classes. The generated hierarchy can be navigated using the Visitor Pattern
- sql
- java
- parser
- ast
- postgresql
- mysql
- +7 more
+73 stars
from 5,897 · score 4.30
5.knowm / XChange
XChange is a Java library providing a streamlined API for interacting with 60+ Bitcoin and Altcoin exchanges providing a consistent interface for trading and accessing market data.
+53 stars
from 4,044 · score 3.99
+48 stars
from 964 · score 3.89
7.OpenIdentityPlatform / OpenAM
OpenAM is an open-source access management solution for identity authentication, authorization, and federation. It provides single sign-on, adaptive authentication, and centralized policy control, enabling secure access to web, mobile, and cloud applications
- openam
- sso
- oauth
- saml
- aaa
- authentication
- +14 more
+31 stars
from 871 · score 3.47
8.cassandre-tech / cassandre-trading-bot
Create your Java crypto trading bot in minutes. Our Spring boot starter takes care of exchange connections, accounts, orders, trades, and positions so you can focus on building your strategies.
- trading-bot
- trading-strategies
- trading
- bot
- cryptocurrency
- java
- +14 more
+13 stars
from 648 · score 2.64
9.jeyben / fixedformat4j
Lightweight Java library for reading and writing fixed-width / fixed-length flat files using annotations on POJOs — for banking, payroll, EDI, mainframe, and batch integrations.
- annotations
- banking
- batch-processing
- edi
- fixed-format
- fixed-length
- +8 more
+5 stars
from 48 · score 1.79
10.square / connect-java-sdkArchived
Java client library for the Square Connect v2 API
+1 stars
from 41 · score 0.69