The following table summarizes the differences among the recent Tcl/Tk
releases.
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Download Tcl/Tk
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Tcl/Tk 8.6 is the latest stable release of Tcl/Tk.
Tcl 8.6 is highly compatible with previous Tcl versions.
See the list of features and improvements in Tcl/Tk 8.6.
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Download Tcl/Tk
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Tcl/Tk 8.5 is the previous stable release of Tcl/Tk.
Tcl 8.5 is highly compatible with previous Tcl versions.
See the list of features and improvements in Tcl/Tk 8.5.
ActiveState's
Tcl Dev Kit
supports 8.5 to provide a comprehensive set of development tools for
the entire range of Tcl developers.
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Download Tcl/Tk
Downloading Tcl/Tk 8.6.16 or newer is recommended
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Tcl 8.4 is highly compatible with Tcl 8.3 through Tcl 8.1.
Users of those versions should have no troubles upgrading.
It introduces new core widgets, significant performance enhancements,
numerous command enhancements and improved 64-bit integer and file system
support, among other things. It was several years in development.
The Tcl Dev Kit
builds on Tcl 8.4 to provide a comprehensive set of development tools for
the entire range of Tcl developers.
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Downloading Tcl/Tk 8.6.16 or newer is recommended
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In Tcl/Tk 8.3 we have added many new features to Tk
based on the Dash patch and Img patch from Jan Nijtmans.
There are several new features added to Tcl as well.
The main 8.3 page has more details.
Tcl 8.3 is highly compatible with Tcl 8.2 and Tcl 8.1.
Users of those versions should have no troubles upgrading.
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Downloading Tcl/Tk 8.6.16 or newer is recommended
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In Tcl/Tk 8.2 we have updated the build process to the new Tcl Extension
Architecture (TEA). This includes the use of the cygwin make and autoconf
process on the Windows platform, although we continue to use VC++ compiler.
The new features are primarily at the C-level APIs to support new extensions.
Most notable is the Tcl_StackChannel API that lets the you add compression
and encryption processing modules to Tcl I/O channels. There are also
new regular expression C APIs to support Expect.
Tcl 8.2 is essentially identical to Tcl 8.1 for the Tcl script writer. We have
significantly improved the performance of the string command. We
also eliminated minor bugs left over from the 8.1 release.
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Downloading Tcl/Tk 8.6.16 or newer is recommended
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Tcl/Tk 8.1 was a major overhaul of Tcl/Tk. Tcl/Tk 8.1 features new support for Unicode and internationalized applications. It also adds thread-safety to the C implementation, and an all new regular expression package from Henry Spencer that adds Advanced Regular Expressions of the kind found in Perl 5.
If you are a Tcl script writer, Tcl/Tk 8.1 is compatible with Tcl 8.0.
If you are a C extension author, then you may have some work to do
to bring your application up-to-date with the new C APIs added in this
release.
Since 8.2 fixes many bugs that are found in 8.1 and is basically identical to 8.1
for script writers, we recommend that everyone use 8.2 in preference to 8.1
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Download Tcl/Tk 8.0.5
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Tcl/Tk 8.0 was a widely used release. Its last patch release was 8.0.5, although many mirror sites still distribute 8.0.2 (also known as 8.0p2). Tcl 8.0 added an on-the-fly byte-code compiler and Tk 8.0 added improved cross-platform look and feel. Tk 8.0 added a menubar facility and a platform-neutral font naming system.
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The source code history for Tcl, Tk and several related software
packages is managed by Fossil
and is browseable on the web at core.tcl.tk.
This site gives you access to the very latest code updates, as well as
historical snapshots of previous releases back to 8.0.3.
If you are making modifications to the Tcl/Tk core, this is the best way
to keep your changes up-to-date.
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The web browser plugin enables Tcl/Tk inside the browser, just like
Java. Version 2 is based on Tcl 8.0 and version 3 is based on Tcl 8.4.
It imposes security restrictions on what a Tcl script can do inside the
browser, although this is configurable by tuning the security
policies. There is more information on the
Plugin Home Page.
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Some applications may require older versions of Tcl/Tk.
These are available for download at SourceForge. Due to changes
in the computing world since their release, you may find many
old releases will no longer build or run on current computing
platforms.
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