Autopsy is a digital forensics platform and GUI for other digital forensics tools that is relied on by law enforcement, military and corporate examiners when they need to find out what happened on a computer. Can also be used to recover photos from a camera's memory card. Thanks go to JustAnotherITUser for the recommendation.
PDFsam Basic is an open-source application that lets you split, merge, extract pages, rotate and mix PDF files on Windows, Mac and Linux. Provides a simple interface and batch processing tools.
MicroSIP is a portable, open-source SIP softphone for Windows OS. It enables you to make high-quality VoIP calls (person-to-person or on regular telephones) via the open SIP protocol. Allows you to choose any SIP provider and get free person-to-person calls and low-cost international calls. panzerstyle finds it "great for VoIP/SIP testing and a plain ole SIP client."
TestSSLServer is a command-line tool for contacting an SSL/TLS server to get information on its configuration. Works through your internal network, so you can test servers before they are accessible from the internet. Gathers supported protocol versions and cipher suites; supported certificate(s) used; key type, size, and hash function used in the signature; type and size of ephemeral Diffie-Hellman parameters (or elliptic curve for ECDHE cipher suites) and offers support of Deflate compression.
CotEditor is an open-source plain-text editor built for MacOS. The GUI looks and acts like a Mac-native app, and its rapid launch feature gets you working immediately. PhotographyPhil likes it as a Notepad++ equivalent for MacOS.
Packetbomb Wireshark Minicourse is designed to help you make the most of Wireshark. digitaltransmutation appreciates it for honing the skills in "practical wiresharking that will get you from 'I think there is a networking issue' to 'Here is the specific network / application / device issue.' I picked up on this after watching a guy break up a 3-way vendor "not me" catfight that had been going on for months because he was able to explain exactly what was going wrong in a way that left no room for doubt.
ueli is a keystroke launcher for Windows and MacOS that searches for applications on your computer. You can specify which folders to search and which file extension should be used to recognize an application. Kindly suggested by JustAnotherITUser.
VDesk is an open-source solution for launching programs on new virtual desktops in Windows 10. The program is command line but ships with an option to integrate in File Explorer. Kindly suggested by JustAnotherITUser.
YOURLS (Your Own URL Shortener) allows you to run your own URL-shortening service. This set of PHP scripts can create both private (yours only) and public (works on internet) links, so you can add your own branding and don't have to depend on third-party services. Our thanks go to Teknit for the recommendation.