One of the features from Windows that I miss most is that Alt-tab switches between apps, not windows. HyperDock attempts to fix that, among many other things. When you mouse over an app’s icon in the dock, it shows all of the open windows.
I just came across a great article by MakeUseOf regarding the best places to get freeware for the Mac. It looks like with all of the sites they mentioned, there is a very wide selection. Check it out here.
If you do a lot of research or otherwise “web-intensive” work, you probably know all-too-well how hard it is to manage many tabs at once. Tab Mix Plus for Firefox solves this issue, and gives you many other features too. However, it activates many of its features automatically, so if you only want one of them, you have to go and change every other setting off. Overall, it is a good solution though. https://addons.mozilla.org/en-US/firefox/addon/1122/
Have you ever been annoyed that you have to sign up for every website you visit? Here’s a solution: BugMeNot. It has a large database of public usernames and passwords for popular websites that you can log in with. There is a Firefox addon, a Chrome plugin, and a website with an index of the passwords.
Note: It violates the TOS to use it on paid websites and similar.
Have you ever been in a situation where you needed to edit an image, but didn’t have the software to do it on your computer? What about editing audio, or taking web page screenshots? Aviary is an amazing tool that lets you do this online in a Flash-based interface. You can create an account, or sign in with an account such as Google, Twitter, etc. Try it @ Aviary.com