We maintain various open source projects. The projects can be found on Github github.com/methics/
MSS Clients
Laverca SOAP Client
Laverca is a SOAP based MSS client that supports ETSI 102 204 signature API and Kiuru MSSP Registration API.
Laverca CSC Client
Laverca-csc-client is a REST client for CSC API v1.4.0. It can be used to create a desktop signing application with Kiuru RSSP.
Other Tools
PAdES Validator
PAdES validator is a simple tool for validating signed PDF files.