Based on our record, Dia should be more popular than Topcoder. It has been mentiond 11 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I used GIMP (https://www.gimp.org) and Dia Diagram Editor (http://dia-installer.de) I can't say I was very happy with either for what I was doing (laying out mount points for solar panels) FreeCAD (https://www.freecad.org) looks like a good option as does Inkscape but I believe it has a high learning curve. I am also playing around with Open Solar's online tool (https://app.opensolar.com). Source: 11 months ago
Perhaps the old Dia (works on W10). There's a portable version on Portableapps.com. Source: 12 months ago
Its a bit old and pretty simple, but I use Dia frequently. Source: about 1 year ago
Dia Diagram Editor for simple schematics and flowchart type diagrams for something very quick and easy to pick up in five minutes, and. Source: about 1 year ago
Project 1: Use the open source UML diagrammer, DIA (link) to make a readable network map :). Source: over 1 year ago
Leetcode.com for problem solving practice. Do basics first before jumping into this one. Similar thing you can do at topcoder.com for trying to code with a timer. Great for problem solving practice. Source: about 1 year ago
I know topcoder.com does competitive programming for $$, I haven't done it myself though so I'm not entirely sure how it works. Source: about 1 year ago
One thing I noticed is topcoder.com is in "Advanced" and I'm not sure but, how is Top Coder any more advanced than others? Source: almost 2 years ago
Usually, I go to hackerrank.com or topcoder.com to choose the easiest challenge and I do it. In that way, you can compare your solution with other ones and get better. Source: over 2 years ago
Some, like Hackerrank.com and topcoder.com can connect you to employers once you get good. Source: over 2 years ago
draw.io - Online diagramming application
LeetCode - Practice and level up your development skills and prepare for technical interviews.
yEd - yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
Codechef - CodeChef is a not-for-profit educational initiative by Directi, an Indian software company. It is a global programming community that fosters learning and friendly competition, built on top of the world’s largest competitive programming platform.