When comparing PSPad vs Aptana Studio, the Slant community recommends PSPad for most people. In the question“What are the best JavaScript IDEs or editors?” PSPad is ranked 24th while Aptana Studio is ranked 40th. The most important reason people chose PSPad is:
PSPad is completely free to download and use.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Free
PSPad is completely free to download and use.
Pro Simple and small
PSPad is simple, small, and lightweight. It's also quite fast.
Pro Code highlighting for many languages
PSPad supports code highlighting for several languages.
Pro Portable version
Pro Column mode
Editing in column mode.
Pro Integrated HEX editor

Pro Accented words
In PSPad, the user can add accents to words.
Pro Integrated FTP client
Pro Available in standalone and Eclipse plugin versions
Aptana Studio has standalone (130.7 MB for Windows) and Eclipse-plugin versions.
Pro HTML5-aware code assist
Aptana's code assist displays which tags are supported by which browsers.
Pro Support for web projects
Aptana was specifically created for web application development. It supports a variety of languages such as HTML, CSS, JavaScript, PHP, and Ruby.
Pro Built-in terminal
Has a built-in terminal emulator from which you can run commands.
Pro Free and open source
Aptana is available for free under the GPL license with source code available on GitHub.
Pro Git integration
Aptana provides integrated support for Git to make collaboration and version control easier.
Cons
Con Windows only
It's only available for Windows.

Con No code folding
Does not support code folding.
Con No content assist
Con Many dependencies
Aptana has a couple of dependencies to keep in mind.
It is built with Java and and has some requirements for the JDK version.
Aptana requires Git, and Eclipse 3.5+ if you are installing it as an Eclipse plugin.
Con No longer updated
Language support is increasingly dated.
