Top 5 Java Openpgp Projects

Bouncy Castle

4 1,855 9.6 Java

Bouncy Castle Java Distribution (Mirror)

Project mention: Help with BouncyCastle OpenPGP (Java) | reddit.com/r/openpgp | 2022-12-23

The best official resources are probably the example classes in the bouncycastle repository. They give you a rough idea for how to use the API, although they are a bit minimal unfortunately. You can probably apply a lot of domain knowledge (what algorithms are good/bad) from openpgpjs too, although you'd have to find out how the respective method calls are called on the BC side.
OpenKeychain

9 1,850 0.0 Java

OpenKeychain is an OpenPGP implementation for Android.

Project mention: OsmAnd (OpenStreetMap) 4.3 for Android is fast with a new rendering engine | news.ycombinator.com | 2023-01-27

OpenKeychain is an Android app for doing some basic GPG related work. It can verify signatures (hidden in the "encrypt/decrypt" menu)
Also it integrates i.e. with K-9 mail to sign and verify.
https://github.com/open-keychain/open-keychain
Sonar

www.sonarsource.com
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bouncy-gpg

2 196 0.0 Java

Make using Bouncy Castle with OpenPGP fun again!

Project mention: Easy OpenPGP With PGPainless | dev.to | 2022-08-25

That's why I decided to create PGPainless. Originally, I was looking for other alternatives and stumbled across a library called bouncy-gpg, but I quickly figured that it was not suiting my needs and decided to go my own way. Nevertheless, bouncy-gpg heavily influenced PGPainless' development, especially in the early phases.
openpgp-api

0 125 0.0 Java

OpenPGP API library
pgpainless

4 95 9.4 Java

Simple to use OpenPGP API based on Bouncy Castle

Project mention: Easy OpenPGP With PGPainless | dev.to | 2022-08-25

That's why I decided to create PGPainless. Originally, I was looking for other alternatives and stumbled across a library called bouncy-gpg, but I quickly figured that it was not suiting my needs and decided to go my own way. Nevertheless, bouncy-gpg heavily influenced PGPainless' development, especially in the early phases.
InfluxDB

www.influxdata.com
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NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2023-01-27.