Here are some useful websites on the internet that provides free web app. All these apps are available online for free and require no installation.
audio-joiner.com - is a free tool that enables you to join multiple audio files into a single one. It supports most audio formats and allows crossfading you tracks.
moviemakeronline.com - is instanly online movie maker. Upload pictures and favorite music to make video easy. No make movie software download required. No watermark.
convertfiles.com - Convert your files from one file type to another without downloading any software. Convert for free almost any type of ebooks, documents, archives, spreadsheets, audio and video files to your desire file format. Convert YouTube to mp3.
picmonkey.com - is an online Image editor, that allows you to touch up your images. Also, you can apply different effects, fonts, and designs to your images.
cutmp3.net - Audio Cutter. With this tool you can cut any audio file online. No more complicated programs for cutting. Cut MP3 Instantly. Make ringtone online.
keepvid.com - is a free web application that allows you to download videos from sites like YouTube, Facebook, Twitch.Tv, Vimeo, Dailymotion and many more. Just you need is the URL of the page that has the video you want to download.
pdfescape.com - that can quickly edit PDFs in the browser itself. It features PDF editing, form filling, page arrangement, printing, saving, and form publishing. Also Share & Collaborate on PDF documents.
screenr.com - is web-based recorder makes it easy to create and share your screencasts around the web. Just click the record button, capture your screen and voice, and share the link.
wobzip.org - is unzip your compressed files online. No installation required. It's safe and free.