Thunderbird: open-source, free mail client. Install at least these addons:
Quicktext (for inserting quick templates of text and HTML)
Nostalgy (for quickly filing mail and jumping between folders)
A spellchecker (and always have spell-checking activated to run before you send email)
Google Chrome for web browsing, testing, and great extensions.
Mozilla Firefox for web browsing, website testing, and its awesome array of useful addons.
Safari for web browsing and website testing
Skype for instant messaging and phone calls
LibreOffice for text documents and spreadsheets (LibreOffice.org)
Notepad++ for quick text files and simple code edits (on Mac, try TextWrangler or Sublime)
Adobe Reader for opening PDFs
AVG antivirus (the free edition)
Irfanview for quickly cropping and resizing pictures
Filezilla for getting files on and off remote servers via FTP
Trello, a web-based project management program
Sage Pastel My Business Online, a multi-user accounting application
Youtube, for video sharing online
Vimeo, for video sharing online
WordPress, an open sourced blogging tool
OpenOffice, an open source office software suite
Base, an online CRM management program
Quicktext, widget for Thunderbird
Trovebox, for online storage of information
Bitly, an online URL shortener
Textwrangler, a text editor for Mac
Irfanview, an image editor
CamStudio, for creating screencast videos
Any Video Converter, file size converting
Highly recommended software
Dropbox, either for your own files or for syncing withthe company shared files (be sure to read up about how Dropbox works, especially before deleting any files, or syncing with the company share).
HeidiSQL for viewing MySQL databases
EpubReader, as a Firefox addon, for reading DRM-free epubs
Kindle for PC for reading Kindle ebooks on your computer
7-Zip for extracting and compressing files (especially ones the Windows built-in unzipper can’t handle, like .tar)
PDFCreator for printing to PDF
Evolus Pencil for creating screen wireframes for user interfaces or even things like quick poster or flyer design drafts
VideoLAN (aka VLC) media player, for those occasions when Windows Media Player won’t play your music or video
Sigil, if you ever have reason to edit or look inside epub files.
Github, for building software online
EasyFile-employer, for your emp501 returns
The inside story of our experiment in distributed print-on-demand