Here is a free online tool which converts up to 100 mb of flash files to mp3 audio files. You can easily convert your offline flash files or also online videos from different video sharing services.
Here is a web utility to resize images, rotate it and download instantly. This also has a firefox addon to make image resizing process easy and fast. Current support is for jpg images and the resizing will be done instantly and you can download the next moment.
Everyone knows the usage of language translators if the source language is known. Here is what you can do if the source language is unknown / foreign. In such cases also you can translate the source text to your language.
Test everything is a wonderful tool which has a collection of all tools required to benchmark a website. You will find it useful to inspect your competitor website with yours. You can test statistics like seo, social popularity, design issues, network performance…
Hiding text in order that visitors can identify it but hiding the same in the eyes of bots comes under white hat and we are NOT discussing something related with black hat SEO. This becomes necessary when you need to leave your mail ids in open forums.