Process Monitor displays both file system and registry activities in real-time, combining the features of FileMon and RegMon. Additional features includes live changes (autoscroll), non-destructive filtering, comprehensive event properties such session IDs and user names, reliable process information, full thread stacks with integrated symbol support for each operation, file logging etc.
Alternatively, Process Monitor Portable is also available, which is stealth.
FocusWriter is a full-screen word processor that aims for a distraction-free, immersive way to write and edit. The minimalist interface puts options and tools on the edge of the screen and auto-saves progress. Upon relaunch, the program reloads your last file to make make it easy to jump back into your work.
Alternatively, FocusWriter Portable is stealth and automatically adjusts paths.
CudaText is a code editor with a clean, tabbed interface and side-panels. Includes split view, code folding, hotkeys, theme support, color picker and much more. The program supports 300+ syntaxes and add-ons written in Python, as well as some IDE features if plugins are used.
The program is cross-platform, with clients available for Mac and Linux. Settings are modified either via options dialogs, or alternatively, by manually editing text config files (JSON format).
Vivaldi is a customizable, tabbed web browser based on the same engine as Google Chrome. Its appearance and capabilities can be extended with themes and extensions. It features a bookmark manager, speed dial, notes, custom search engines, sessions, tab stacks, web panels, mouse gestures, keyboard shortcuts, user interface scaling, adaptive interface color and much more.
Cross-platform with clients available for Mac and Linux.
Mozilla Thunderbird is a skinnable, feature-rich email, calendar, task and instant messaging client with support for plugins and many protocols. It comes with advanced search tools, message filtering, Bayesian spam detector, built-in spell checker, mailbox compression and many more. Program features can be extended with add-ons, including a specialized version of email encryption tool GPG.
Email protocols include SMTP, POP3, IMAP (including uploads, albeit a date issue), NNTP and RSS and chat support for IRC, Twitter, XMPP, Google Talk, and Matrix. Also supports OAuth for use with accounts that require it instead of a password.
Mozilla Thunderbird, Portable Edition is a special build licensed by Mozilla. Alternatively, X-Thunderbird is also available. For XP/Vista, version 52.9.1 is available here.
7-Zip is an archive manager that can view and create a wide variety of formats. The program includes folder favorites, optional two-pane view, checksum calculator, file split/combine capability and more. Individual archives can be created with high speed or high compression settings, update options (including update, add/replace, synchronize), split volumes and more. Archives can be secured with standard zip or more secure AES encryption.
Although the official archiver for the open, high-compression “7z” format, the program also supports the creation of multiple formats including ZIP, XZ, BZIP2, GZIP, TAR and WIM. It will extract a long list of other formats, among them RAR, CAB, ISO, ARJ, RPM, VHD, VMDK etc. Even more formats are supported through third-party plugins. Supports many world languages.
Additionally, to use alternative toolbar and file icons, 7-Zip Theme Manager is available.
7-Zip Portable is a wrapper from PortableApps.com, auto-detecting 32 or 64-bit automatically. Alternatively, X-7zip is also available.
There is also a 7-Zip standalone console version.
DiskGenius is full-featured partition manager, which is designed to optimize disk usage for Windows users. It allows you to resize, extend, split, create, delete, format, hide, copy and erase partition to maximize disk space use.
DiskGenius is a complete disk & partition solution for Windows PCs that helps managing storage space for higher efficiency.
There is also a Lite version available that only features the partition manager. Find the links in the comments or in the associated forum thread.
NOTE: Recent press about CCleaner indicates it may represent a privacy concern.
CCleaner is a feature-rich system optimization and privacy tool. The program cleans unused, temporary and log files from your system, as well as traces of online activities such as Internet history and flash cookies. The program contains startup controls for Windows, major internet browsers and context menu entries. Includes a separate registry cleaner, duplicate search, system restore tool and can wipe both deleted files and drive free space for security.
A 64-bit version is available (within the folder). Monitoring functions are only available in the pro version.
Additional cleaner rules can be using an unofficial set of community-developed set. It should be noted that many of these rules are alpha and the developers will not provide support for these rules, a thread in the users forum is dedicated to supporting the add-on rules.
Alternatively, ccPortable is also available.
Pale Moon is an Open Source fork of a previous version of Firefox focusing on ease of use, efficiency and customization.
Pale Moon is built for multiple operating systems other than Windows and strives to offer a browser built independently (using the Goanna browser engine, the same as K-Meleon), with selected features and optimizations aimed at improving browser stability and overall user experience.
PrivaZer scans and cleans your computers and storage devices, including external disks, USB flash drives, iPods, SD cards or network drives. It safeguards your privacy by removing unwanted traces of internet activities, software usage, USB history, registry and files.
The program includes an available secure delete function that overwrites files to prevent recovery.