• Added new renderers Alto, LSTMBox, WordStrBox.
• Added character boxes in hOCR output.
• Added python training scripts (experimental) as alternative shell scripts.
• Better support AVX / AVX2 / SSE.
• Disable OpenMP support by default (see e.g. #1171, #1081).
• Fix for bounding box problem.
• Implemented support for whitelist/blacklist in LSTM engine.
• Improved cmake configuration.
• Code modernization and improvements.
• A lot of bug fixes...

Detailed changelog is on wiki.

Windows installer can be downloaded from https://github.com/UB-Mannheim/tesseract/wiki.