itext-java is queued for analysis. Crawling candidates and ranking them takes a few minutes. This page updates itself when the list exists — you can also come back later.
What is known so far comes from the other direction:
These projects were analysed and named itext-java among their alternatives. The relationship is not symmetric — how itext-java rates them is a separate judgement, made when itext-java is analysed in its own right.
calls itext-java “Use for PDF signing inside Java applications when you don't need a dedicated signing server.”
SignServer – Open source, PKI-based signing software to sign code, documents, timestamps and more.