First, the Open Source Intelligence (OSINT) Framework is the collection and analysis of information that is gathered from public, or open, sources. It is an EXCELLENT resource
Most of these utilities I have found and rely on are for Windows.
File Renaming/Copying/Syncing/Managment
Bulk Rename Utility allows you to easily rename files and entire folders based upon extremely flexible criteria.
TreeSize Professional by Jam-Software is a powerful and flexible hard disk space manager for all Windows versions and client/server versions currently supported by Microsoft.
FolderMatch by Salty Brine Software folder comparison and synchronization software for Windows XP/2003/Vista/7,8,10 - 32 & 64 bit
FolderClone by Salty Brine Software A 'Set it and Forget it' synchronization solution for Windows XP/2000/2003/Vista/Win 7,8,10
GoodSync - Easy-to-use software automatically backs up and syncs your files between any computer, mobile device or drive; with or without using the cloud. All this with no monthly fees!
SSH/Telnet/etc.
PenguiNet by ssiliconcircus is an all-in-one SSH client for Windows! PenguiNet includes an SCP browser, so that you can easily transfer files with just a few mouseclicks.
PuTTY is an SSH and telnet client, developed originally by Simon Tatham for the Windows platform.
Bitvise SSH Client is an SSH and SFTP client for Windows.
Bitvise SSH Server is an SSH, SFTP and SCP server for Windows.
WinSCP is an open source free SFTP client, FTP client, WebDAV client and SCP client for Windows.
SFTP Net Drive by EldoS Access remote disk over net using SFTP protocol and map it to local drive letter - SFTP Net Drive
Compression
Password
eWallet by iLium Software helps you by keeping your passwords safe, but easy for you to access when you need them...
Notes/ToDo Lists, etc.
Evernote lets you capture, nurture, and share your ideas across any device.
Notepad Editing
UltraEdit's text editing features make editing lists and columns an intuitive experience, not the exercise in tedium it used to be. With features like multi-caret editing, column/block editing and multi-select, it's a simple text editor when you want it to be, and a multi-cursor power editor when you need it to be. It also can edit directly from SFTP/SSH servers.
Notepad++ is a free (as in "free speech" and also as in "free beer") source code editor and Notepad replacement that supports several languages. Running in the MS Windows environment, its use is governed by GPL License.
Virtual CD/DVD Utilities
UltraISO by EZB Systems is an ISO CD/DVD image file creating/editing/converting tool and a bootable CD/DVD maker
Virtual Clone Drive by Elaborate Bytes Mount ISO files with Virtual CloneDrive and use them like a physical drive. Virtual CloneDrive is freeware and has been downloaded more than 10,000,000 times!
Network
Wireshark is the world’s foremost and widely-used network protocol analyzer.
Security Utilites
NMAP - the Network Mapper - Free Security Scanner
VirusTotal.com is a free service that analyzes suspicious files and URLs and facilitates the quick detection of viruses, worms, trojans, and all kinds of malware.
Snare and Epilog Agents - The Snare Server secures your event logs with encrypted log transport and time stamped message files, which is of major relevance.
FCIV by Mircosoft Windows 10 MD5 Checksum Tool
GNU WGet is a free software package for retrieving files using HTTP, HTTPS, FTP and FTPS the most widely-used Internet protocols. It is a non-interactive commandline tool, so it may easily be called from scripts, cron jobs, terminals without X-Windows support, etc.
QuickHash GUI is an open-source data hashing tool for Linux, Windows, and Apple Mac OSX with graphical user interface (GUI).
LDAP
LDAP Administrator by Softerra s an easy-to-use LDAP administration tool designed to work with almost any LDAP server including Active Directory, Novell Directory Services, Netscape/iPlanet, etc.
LDAP Browser by Softerra is a lightweight version of Softerra LDAP Administrator. It supports read-only operations that do not modify LDAP directory data, e.g. browsing, search, export, etc.
Adobe Photoshop and Premiere Elements You take pictures and video of all your special moments. Adobe Photoshop Elements 15 & Premiere Elements 15 automates the organizing and editing so you can have fun creating and sharing amazing photos and movies.
Remote Support
DameWare Mini-Remote Control Remote control software for help desks of any size.
Bomgar Remote Desktop Support #1 Remote Support Tool of Leading Enterprise Support Organizations
TeamViewer allows you to create a remote support session or an online meeting including supporting Android Phones, tablets, etc.
System Admin Utilities
Backup Tools
Veeam® Endpoint Backup™ FREE provides a simple solution for backing up Windows-based desktops and laptops.
Misc. Freeware Utilities
Windows Sysinternals - The Sysinternals web site was created in 1996 by Mark Russinovich to host his advanced system utilities and technical information. Whether you’re an IT Pro or a developer, you’ll find Sysinternals utilities to help you manage, troubleshoot and diagnose your Windows systems and applications. You can find the entire Sysinteranls Suite extremely helpful as a Microsoft System Admin.
Media Tools
SD Card Formatter - This software formats all SD memory cards, SDHC memory cards and SDXC memory cards.
Debugging
Boot Utilities
General Boot CD's for system utilities
Hiren Boot CD
FalconFour’s Ultimate Boot CD
SystemRescueCD
Ultimate Boot CD
Trinity Rescue Kit
CloneZilla
Security Boot Distrobutions
BackTrack
Operator
PHLAK
Auditor
L.A.S. Linux
Maps
Google Earth Pro {Now Free}
Scripting
AutoIT v3 is a freeware BASIC-like scripting language designed for automating the Windows GUI and general scripting. It uses a combination of simulated keystrokes, mouse movement and window/control manipulation in order to automate tasks in a way not possible or reliable with other languages.
Free Operating Systems