Inno Setup is an open-source installation builder for Windows applications by Jordan Russell and Martijn Laan. Since its introduction in 1997, Inno Setup has been trusted by developers and organizations of all sizes to reliably deploy software to millions of PCs worldwide.
JSON to DataSet and DataSet to JSON converter for Delphi and Lazarus (FPC)
API to consume REST services written in any programming language with support to Lazarus and Delphi
BCrypt is a password hashing function
AsmProfiler is a full tracing 32bit profiler (instrumenting and sampling), written in Delphi and some assembly.
Fast scaling memory manager for Delphi