FD.io's Vector Packet Processor (VPP) is a fast, scalable layer 2-4 multi-platform network stack. It runs in Linux Userspace on multiple architectures including x86, ARM, and Power architectures.

VPP's high performance network stack is quickly becoming the network stack of choice for applications around the world.

VPP is continually being enhanced through the extensive use of plugins. The Data Plane Development Kit (DPDK) is a great example of this. It provides some important features and drivers for VPP.

VPP supports integration with OpenStack and Kubernetes. Network management features include configuration, counters, sampling and more. For developers, VPP includes high-performance event-logging, and multiple kinds of packet tracing. Development debug images include complete symbol tables, and extensive consistency checking.

Some VPP Use-cases include vSwitches, vRouters, Gateways, Firewalls and Load-Balancers, to name a few.

Fluent Bit is an open source and multi-platform Log Processor and Forwarder which allows you to collect data/logs from different sources, unify and send them to multiple destinations. It's fully compatible with Docker and Kubernetes environments.

Fluent Bit is written in C, have a pluggable architecture supporting around 30 extensions. It's fast and lightweight and provide the required security for network operations through TLS.

pdfsandwich generates "sandwich" OCR pdf files, i.e. pdf files which contain only images (no text) will be processed by optical character recognition (OCR) and the text will be added to each page invisibly "behind" the images.

pdfsandwich is a command line tool which is supposed to be useful to OCR scanned books or journals. It is able to recognize the page layout even for multicolumn text.

Essentially, pdfsandwich is a wrapper script which calls the following binaries: unpaper (since version 0.0.9), convert, gs, hocr2pdf (for tesseract prior to version 3.03), and tesseract. It is known to run on Unix systems and has been tested on Linux and MacOS X. It supports parallel processing on multiprocessor systems.

While pdfsandwich works with any version of tesseract from version 3.0 on, tesseract 3.03 or later is recommended for best performance. By default, pdfsandwich runs unpaper to enhance the readability of scanned pages and to improve OCR. For instance, slightly rotated pages are automatically straightened and dark edges removed. For optimally scanned pdf files, this can be switched off by option -nopreproc to speed up processing.