Celestia is an application for real-time 3D visualization of space, with a detailed model of the solar system, over 100,000 stars, more than 10,000 galaxies, and an extension mechanism for adding more objects.



Browse 348 PortableApps.com Software on AlternativeTo including popular Open Source options.
Celestia is an application for real-time 3D visualization of space, with a detailed model of the solar system, over 100,000 stars, more than 10,000 galaxies, and an extension mechanism for adding more objects.



Record your computer screen with audio input from Mic or Speakers. Also shows mouse clicks in addition to the regular cursor. Simple interface with ability to record in AVI or export as swf.



Stickies is a PC utility written to replace Post-It-style notes left stuck to your monitor. The design goal behind Stickies is that the program is small and simple. Stickies will not mess with your system files, or write to the Registry.


Math is LibreOffice's formula editor, and can be invoked in your text documents, spreadsheets, presentations and drawings, enabling you to insert perfectly formatted mathematical and scientific formulas.




VVV is an application that catalogs the content of removable volumes like CD and DVD disks for off-line searching. Folders and files can also be arranged in a single, virtual file system. Each folder of this virtual file system can contain files from many disks so you can...



SRWare Iron, or simply Iron, is a fork of the free and open-source web browser Chromium , of which Google Chrome is a fork of. Iron primarily aims to eliminate usage tracking and other privacy violating...


Balabolka is a Text-To-Speech (TTS) program. All computer voices installed on your system are available to Balabolka. The on-screen text can be saved as a WAV, MP3, MP4, OGG or WMA file. The program can read the clipboard content, view the text from DOC, EPUB, FB2, HTML, ODT...



gPodder downloads and manages free audio and video content ("podcasts") for you. Listen directly on your computer or on your mobile devices.

NSIS (Nullsoft Scriptable Install System) is a professional open source system to create Windows installers. It is designed to be as small and flexible as possible and is therefore very suitable for internet distribution.




Raster & vector graphic editor with many tools and filters, written in Lazarus. Portable, 32bit & 64bit versions, ORA format & 16384x16384 image support. In app 3D import & rendering.




System Explorer is an enhanced Taskmanager that provides detailed information about running processes, startup programs, IE add-ons (BHOs), drivers, services network connections, system resources and more.



grepWin is a simple search and replace tool which can use PCRE regular expressions to search for strings of text within files. grepWin adds an entry to the shell context menu to easily search selected folders.


Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists. It is designed for composite tasks, and also offers effort tracking, categories, notes and more.




Join "The Project" to restore humanity's synaptic-link technology after nuclear war has devastated Earth, rendering it a Warzone 2100.


PhotoFiltre 7 is a complete image retouching program. It allows you to do simple or advanced adjustments to an image and apply a vast range of filters on it. It is simple and intuitive to use, and has an easy learning curve.

KompoZer is a complete web authoring system that combines web file management and easy-to-use WYSIWYG web page editing.


Improve desktop organization with snapping, docking, and customizable shortcuts for high-resolution and multi-monitor setups.




Open source text editor with notepad-style interface, supports files of any size, multi-window modes, Unicode codepages, plugins, and 20 language modules.




Clean up useless and outdated junk files, browser traces, cookies, and history. Free up disk space, protect your privacy, and speed up your PC.




VirtuaWin is a virtual desktop manager for the Windows operating system (Win9x/ME/NT/Win2K/XP/Win2003/Vista/Win7/Win10). A virtual desktop manager lets you organize applications over several virtual desktops (also called ‘workspaces’).



AssaultCube is a free, multiplayer, first-person shooter game, based on the CUBE engine.
Taking place in realistic environments, with fast, arcade gameplay, it's addictive and fun!



WinDjView is a fast, compact and powerful DjVu viewer for Windows with tabbed interface, continuous scrolling and advanced printing options. It uses the free DjVuLibre library to decode DjVu documents. DjVu is a web-centric format and software platform for distributing documents...

Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA).




KeepNote: note-taking and organization. KeepNote is a note taking application that works on Windows, Linux, and

Toucan is a small portableapp utility allowing you to synchronise, backup and secure your data with more options than the built in suite utilities. It is split up into 7 tabs, allowing you to easily find the function that you want.

