Audacity is a free audio recorder/editor/mixer. You can record sounds, play sounds, import and export WAV, AIFF, and MP3 files, and more. Use it to edit your sounds using Cut, Copy and Paste (with unlimited Undo), mix tracks together, or apply effects to your recordings. It also has a built-in amplitude envelope editor, a customizable spectrogram mode and a frequency analysis window for audio analysis applications. Built-in effects include Bass Boost, Wahwah, and Noise Removal, and it also supports VST plug-in effects.
Remember is a to-do list application, focused>In its most basic form, Remember is a simple list of tasks. If you need more than that, you can add folders to arrange things in a way that makes more sense.There may be times when you’re working>In addition to using Remember in a standalone window, you can attach it to an item in the menu bar. In this mode, you can also click and hold the menu bar icon, and drag the cursor over the list.
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Skim is a PDF reader and note-taker for OS X. It is designed to help you read and annotate scientific papers in PDF, but is also great for viewing any PDF file.
Mjograph is a simple but highly functional 2D plotting program. MjoGraph is well-customized for scientists or researchers who work with computer simulations and want to visulalize results quickly and easily. What’s more, Mjograph offers a lot of tools to create beautiful graphs.
MindNode is a free and very easy to use mindmapping application. It was created with the user in mind and features a very simple interface for quickly creating visual appealing mind maps.
6:Kindle for Mac
Amazon.com just released a free Kindle application for Mac that will allows its users to read books from the Kindle Store> actually be read>Read Kindle Books>Get the best reading experienceavailable>Access your Kindle books even if you don’t have your Kindle with you