a few of the free ebooks if somebody missed them
Code:
https://www.packtpub.com/free-ebook/android-security-cookbook
https://www.packtpub.com/free-ebook/angular-5-companion-guide
https://www.packtpub.com/free-ebook/angular-webapp-cookbook
https://www.packtpub.com/free-ebook/apache-ofbiz-cookbook
https://www.packtpub.com/free-ebook/arduino-development-cookbook
https://www.packtpub.com/free-ebook/blender-3d
https://www.packtpub.com/free-ebook/cassandra-high-performance
https://www.packtpub.com/free-ebook/drupal-views-cookbook
https://www.packtpub.com/free-ebook/getting-started-powershell
https://www.packtpub.com/free-ebook/getting-started-tensorflow
https://www.packtpub.com/free-ebook/ibm-infosphere-replication-server
https://www.packtpub.com/free-ebook/kanban-free-guide
https://www.packtpub.com/free-ebook/learning-ecmascript
https://www.packtpub.com/free-ebook/learning-go-programming
https://www.packtpub.com/free-ebook/learning-ipython
https://www.packtpub.com/free-ebook/learning-java-android-games
https://www.packtpub.com/free-ebook/mastering-extjs
https://www.packtpub.com/free-ebook/mastering-python
https://www.packtpub.com/free-ebook/mastering-sql-queries
https://www.packtpub.com/free-ebook/opencv-cookbook
https://www.packtpub.com/free-ebook/opencv-python
https://www.packtpub.com/free-ebook/optimize-hadoop-for-mapreduce
https://www.packtpub.com/free-ebook/oracle-advanced-plsql
https://www.packtpub.com/free-ebook/oracle-database-utilities
https://www.packtpub.com/free-ebook/raspberry-pi-media-center
https://www.packtpub.com/free-ebook/r-deep-learning-essentials
https://www.packtpub.com/free-ebook/research-a-new-industry
https://www.packtpub.com/free-ebook/sql-server-integration-services
https://www.packtpub.com/free-ebook/squid-proxy-server
https://www.packtpub.com/free-ebook/wordpress-plugin-beginners
https://www.packtpub.com/free-ebook/xamarin-cross-platform-development-cookbook
https://www.packtpub.com/free-ebook/zabbix-network-monitoring
https://www.packtpub.com/packt/free-ebook/amazon-web-services-free
https://www.packtpub.com/packt/free-ebook/android-by-example
https://www.packtpub.com/packt/free-ebook/android-ndk-beginners-guide
https://www.packtpub.com/packt/free-ebook/angularjs-essentials
https://www.packtpub.com/packt/free-ebook/arduino-c-programming
https://www.packtpub.com/packt/free-ebook/devops-quickstart
https://www.packtpub.com/packt/free-ebook/getting-started-with-unity
https://www.packtpub.com/packt/free-ebook/html5-data-visualization-cookbook
https://www.packtpub.com/packt/free-ebook/javascript-high-performance
https://www.packtpub.com/packt/free-ebook/learning-docker
https://www.packtpub.com/packt/free-ebook/learning-python
https://www.packtpub.com/packt/free-ebook/mastering-ios-gamedev
https://www.packtpub.com/packt/free-ebook/mongoDB-starter-guide
https://www.packtpub.com/packt/free-ebook/neural-networks-java
https://www.packtpub.com/packt/free-ebook/object-oriented-javascript-pdf-ebook
https://www.packtpub.com/packt/free-ebook/practical-data-analysis
https://www.packtpub.com/packt/free-ebook/practical-responsive-typography
https://www.packtpub.com/packt/free-ebook/python-machine-learning-algorithms
https://www.packtpub.com/packt/free-ebook/python-raspberry-pi-cookbook
https://www.packtpub.com/packt/free-ebook/r-machine-learning
https://www.packtpub.com/packt/free-ebook/swift-essentials
https://www.packtpub.com/packt/free-ebook/TDD-Swift
https://www.packtpub.com/packt/free-ebook/what-you-need-know-about-machine-learning
https://www.packtpub.com/packt/free-ebook/what-you-need-know-about-python